CN115322197B - 与Tau蛋白具有亲和力的咪唑并萘啶类化合物及其制备方法与应用 - Google Patents
与Tau蛋白具有亲和力的咪唑并萘啶类化合物及其制备方法与应用 Download PDFInfo
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- CN115322197B CN115322197B CN202210744927.0A CN202210744927A CN115322197B CN 115322197 B CN115322197 B CN 115322197B CN 202210744927 A CN202210744927 A CN 202210744927A CN 115322197 B CN115322197 B CN 115322197B
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Abstract
本发明涉及放射性药物化学和临床核医学技术领域,具体涉及一种与Tau蛋白具有高亲和力的咪唑并萘啶类化合物及其制备方法与应用。所述咪唑并萘啶类化合物具有通式(I)结构。该化合物及其衍生物通过放射性核素标记后,可以用于神经退行性疾病的核医学临床诊断,尤其用于诊断包括阿尔茨海默病在内的具有Tau蛋白沉积特征的疾病。化合物的结构如通式(I)所示:
Description
技术领域
本发明涉及放射性药物化学和临床核医学技术领域,具体地说,涉及一种与Tau蛋白具有高亲和力的咪唑并萘啶类化合物及其制备方法与应用。
背景技术
阿尔茨海默病(Alzheimer's Disease,AD)是一种以痴呆为主要特征的神经退行性疾病,病情具有进行性且不可逆转,目前尚无机制治疗和准确诊断,从开始诊断到最终去世,病情会一直加剧。
根据《2018年世界阿尔茨海默病报告》,全世界约有5000万痴呆患者,预计到2050年这一数字将增长到1.52亿。在中国,60岁及以上人群有1507万痴呆患者,其中阿尔茨海默病983万,轻度认知障碍患病率为15.54%,患者人数达3877万。目前AD已经成为继肿瘤、心脏病和脑卒中、糖尿病之后严重威胁人类健康的疾病。因此,AD以及其他神经退行性疾病的早期预防与诊断对于病人来说必不可少,在此方面的研究具有极其重要的意义。
AD发病机理较为复杂,研究表明AD的两大病理生物标志物分别是在神经细胞外的淀粉样蛋白(amyloidβpeptides,即Aβ)沉积形成的斑块和在神经细胞内由过度磷酸化的Tau蛋白构成的神经纤维缠结。
目前,靶向于Aβ的分子探针研究较为成熟,但以Aβ为诊断标准常常会导致假阳性的情况出现,因为Aβ的沉积程度与病情发展并不成正相关。相反地,Tau蛋白与病情的发展有很好的相关性,因此,对于AD地诊断来说,相比于Aβ,Tau蛋白(脑内神经纤维缠结)被视为更理想的靶点。
目前,已有一些靶向于Tau蛋白的分子探针问世,如[18F]T807,[18F]MK6240,[11C]PBB3和[18F]THK5351等。但其均有各自的不足之处,在临床实验中,[18F]T807,[18F]MK6240和[18F]THK5351均脱靶于MAO-B,而[11C]PBB3虽然对Tau蛋白具有较高活性和选择性,但在体内存在不稳定的现象。因此,发展高活性、高选择性和高亲和性的Tau蛋白分子探针是目前的研究热点。
发明内容
针对现有Tau蛋白分子探针存在的问题,本发明提出一种与Tau蛋白具有高亲和力的咪唑并萘啶类化合物及其制备方法与应用。该化合物对Tau蛋白具有较高的亲和力和选择性,通过使用合适的放射性同位素对其进行标记后,可用于核医学显像,尤其适用于包括阿尔兹海默病在内的具有Tau蛋白沉积特征的神经退行性疾病病人的诊断。
第一方面,本发明提供的咪唑并萘啶类化合物,具有如下通式(I)结构:
其中:
X1~X7分别独立的表示N或CH;
R1位于1、2位,R2位于3、4位;
R1和R2分别独立的表示H,其中R3表示123/125/ 127I,18/19F,OH,O11/12CH3,(OCH2CH2)m 18/19F,m为1-6之间的整数。
本发明提供的以萘啶并咪唑结构为主体的通式(I)化合物,可作为对神经纤维缠结(Tau蛋白沉积)具有高亲和力的放射性药物(18F,11C或123/125I,用于PET或SPECT显像),实现对Tau蛋白相关疾病,特别是阿尔兹海默病的早期诊断。
优选地,所述通式(I)化合物选自如下化合物:
其中,化合物1-4、化合物14-17、化合物19中I为123I,125I或127I;
化合物5-13、化合物18中F为18F或19F。
上述优选化合物具有更高的活性、对Tau蛋白具有更高的亲和力和选择性。
第二方面,本发明提供优选咪唑并萘啶类化合物的制备方法,包括:
当I为123I或125I,化合物1-4、化合物14-17、化合物19由三烷基锡、三烷基硅、硼酸或硼酸酯前体化合物与[123/125]NaI溶液在氧化剂存在下反应得到;
当F为18F,化合物5-13、化合物18由OTs、三甲基季铵盐、硼酸、硼酸酯或高价碘辅基前体化合物与[18F]F阴离子在相转移催化剂存在下反应得到。
第三方面,本发明还提供上述咪唑并萘啶类化合物的衍生物,其为通式(I)所示化合物的药用可接受的盐、酯或酰胺类化合物或前药。
第四方面,本发明还提供由Tau蛋白沉积引起的神经纤维缠结疾病的诊断或检测试剂,其有效成分为式(I)所示化合物,和/或其衍生物。
这些疾病包括但不限于阿尔茨海默病、额颞叶退行性变、慢性创伤性脑病、进行性核上性麻痹、皮质基底节退行性变或皮克氏病等。
第五方面,本发明进一步提供式(I)所示化合物和/或其衍生物在制备核医学显像剂中的应用。
具体地,所述核医学显像剂为PET或SPECT显像剂。
与现有技术相比,本发明具有以下优点:
本发明提供的(I)所示化合物,对Tau蛋白具有较高的亲和力和选择性,通过使用合适的放射性同位素对其进行标记后,可用于核医学显像,尤其适用于包括阿尔兹海默病在内的具有Tau蛋白沉积特征的神经退行性疾病病人的诊断。
附图说明
图1为本发明实施例1-20化合物合成过程示意图,其中涉及的反应试剂与条件为:
(a)碳酸氢钠,乙醇,回流,过夜;(b)正六丁基二锡,四三苯基膦钯,甲苯,110℃,氮气保护,10小时;(c)Na125I,3%过氧化氢,1M盐酸,室温,15分钟;(d)18F-,四乙基碳酸氢铵,Cu(OTf)2(Py)4,正丁醇,二甲基乙酰胺,110℃,20分钟;(e)1-溴-2氟乙烷,碳酸铯,DMF,80℃,过夜;(f)溴乙醇或2-(2-氯乙氧基)乙醇或氯代-二聚乙二醇,碳酸铯,DMF,80℃,过夜;(g)对甲基苯磺酰氯,三乙胺,二氯甲烷,室温,7小时;(h)四丁基氟化铵,四氢呋喃,60℃,2小时;(i)18F-,K222/K2CO3,乙腈,100℃,10分钟。
图2为本发明实施例21-30化合物的合成过程示意图,其中涉及的反应试剂与条件为:
(a)碳酸氢钠,乙醇,回流,过夜;(b)三甲胺,三氟乙酸酐,二氯甲烷,室温,半小时;(c)四丁基氟化铵,乙腈,60℃,2小时;(d)18F-,四丁基碳酸氢铵,DMSO,100℃,6分钟;(e)mCPBA,二氯甲烷,室温,2小时;(f)(1)NaH,无水四氢呋喃,冰浴,1小时;(2)二乙二醇,140℃,4小时;(g)对甲基苯磺酰氯,三乙胺,二氯甲烷,室温,5小时(h)18F-,K222/K2CO3,乙腈,100℃,5分钟。
图3为本发明实施例31-39化合物的合成过程示意图,其中涉及的反应试剂与条件为:
(a)碳酸氢钠,乙醇,回流,过夜;(b)三氟乙酸,二氯甲烷,室温,3小时;(c)1-溴-3-氟丙烷或3-溴-1-丙醇,碳酸铯,乙腈,80℃,10小时;(d)对甲基苯磺酰氯,三乙胺,二氯甲烷,室温,7小时;(e)18F-,K222/K2CO3,乙腈,100℃,10分钟;(f)mCPBA,二氯甲烷,室温,2小时;(g)三甲胺,三氟乙酸酐,二氯甲烷,室温,半小时;(h)四丁基氟化铵,乙腈,60℃,2小时;(i)18F-,四丁基碳酸氢铵,DMSO,100℃,6分钟。
图4为本发明实施例40-51化合物的合成过程示意图,其中涉及的反应试剂与条件为:
(a)乙醇,回流,3小时;(b)DMF,130℃,2小时;(c)高碘酸钠,THF/H2O(1:1),室温,24小时;(d)铁粉,乙醇/水(10:1),浓盐酸;(e)氢氧化钾,乙醇;(f)正六丁基二锡,四三苯基膦钯,甲苯,110℃,氮气保护,10小时;(g)Na125I,3%过氧化氢,1M盐酸,室温,15分钟。
图5为本发明实施例59-61化合物的合成过程示意图,其中涉及的反应试剂与条件为:
(a)NBS,TMS-OTf,乙腈,40℃,半小时;(b)二(三苯基膦)氯化钯,碳酸钾,二氧六环,110℃,过夜;(c)正六丁基二锡,四三苯基膦钯,甲苯,110℃,氮气保护,10小时;(d)Na125I,3%过氧化氢,1M盐酸,室温,15分钟。
图6为本发明实施例62中探针[125I]1-3,[125I]8,[125I]54和[125I]60,实施例64中探针[18F]4在AD病人脑组织切片的自显影结果及其对应的银染或6E10染色结果(第一行,女性,102岁,颞叶),(第二行,男性,95岁,额叶)。
图7为本发明实施例62中探针[125I]1在AD病人脑组织切片的自显影结果放大图及其对应的银染或6E10染色结果(A和B,女性,102岁,颞叶),(C和D,男性,95岁,额叶)。
图8本发明实施例62中探针[125I]1在AD病人脑组织切片的自显影结果(A,男性,95岁,颞叶),(B,男性,97岁,纹状体),(C,男性,74岁,额叶),(D,男性,74岁,颞叶),(E,男性,78岁,颞叶),(F,男性,95岁,海马)。
具体实施方式
以下实施例用于说明本发明,但不用来限制本发明的范围。
实施例1:合成化合物1
将化合物8-氨基-1,7-萘啶(75.0mg,0.5mmol),2'-溴-4-碘苯乙酮(152.1mg,0.7mmol)和NaHCO3(70.2mg,0.8mmol)溶于20mL乙醇中,然后用90℃油浴加热回流6小时,反应完毕后,减压蒸馏除去乙醇,加入水,并用乙酸乙酯萃取三次,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比为乙酸乙酯:石油醚=9:1,得到淡黄色固体96.2mg。产率40.5%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.87(d,J=4.3Hz,1H),8.50(s,1H),8.39(d,J=7.2Hz,1H),8.26(d,J=8.0Hz,1H),7.79(s,4H),7.61(dd,J=8.1,4.5Hz,1H),7.25(d,J=7.1Hz,1H).
实施例2:合成化合物2
按照实施例1的合成方法,以为1-氨基异喹啉原料合成化合物2,得到淡黄色产物15.2mg,产率29.0%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.48(d,J=5.7Hz,1H),8.42(d,J=2.3Hz,1H),8.30(dd,J=7.2,2.3Hz,1H),7.84(d,J=7.2Hz,1H),7.78(d,J=2.2Hz,4H),7.68–7.58(m,2H),7.24(d,J=7.2Hz,1H).
实施例3:合成化合物3
根据合成化合物1的方法,以2,7-萘啶-1-胺为原料合成化合物3,得到土黄色固体59.6mg,产率为37.1%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ9.70(s,1H),8.67(d,J=5.4Hz,1H),8.54–8.50(m,2H),7.80(s,5H),7.27(d,J=7.3Hz,1H).
实施例4:合成化合物4
将化合物8-氨基-1,7-萘啶(100.9mg,0.7mmol),2'-溴-4-氟苯乙酮(152.0mg,0.7mmol)和NaHCO3(67.2mg,0.8mmol)溶于50mL乙醇中,然后用90℃油浴加热回流5小时,反应完毕后,减压蒸馏除去乙醇,加入水,并用乙酸乙酯萃取三次,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比乙酸乙酯:甲醇=10:1,得到白色固体110.8mg。产率79.4%。结构如下:1H-NMR(600MHz,CDCl3)δ9.00(d,J=4.4Hz,1H),8.10–8.06(m,2H),8.02(d,J=8.0Hz,1H),8.00(d,J=7.1Hz,1H),7.87(s,1H),7.50(dd,J=8.0,4.5Hz,1H),7.10(t,J=8.6Hz,2H),7.01(d,J=7.0Hz,1H).
实施例5:合成标记前体化合物5
将中间体化合物1(48.4mg,0.1mmol),四三苯基膦钯(18.2mg,0.016mmol)和正六丁基二锡(0.23g,0.4mmol)溶于8mL甲苯中,氮气保护,110℃反应过夜,反应完毕后,减压蒸馏除去甲苯后,加入二氯甲烷,抽滤,减压蒸馏除去二氯甲烷后,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=3:2。得到淡黄色固体10.2mg,产率18.7%。结构如下:1H-NMR(600MHz,CDCl3)δ8.09(t,J=8.9Hz,1H),7.60(d,J=5.6Hz,1H),7.57(s,1H),7.55(d,J=6.3Hz,1H),7.37(d,J=5.8Hz,2H),7.06(dd,J=6.0,3.5Hz,1H),7.00(t,J=7.0Hz,2H),6.73(d,J=5.7Hz,1H),2.26–2.24(m,4H),2.09–2.05(m,7H),1.86(d,J=6.3Hz,4H),1.70(t,J=5.8Hz,12H).
实施例6:合成标记前体化合物6
将中间体化合物2(60.1mg,0.16mmol),四三苯基膦钯(28.1mg,0.024mmol)和正六丁基二锡(0.36g,0.65mmol)溶于9mL甲苯中,氮气保护,110℃反应过夜,反应完毕后,减压蒸馏除去甲苯后,加入二氯甲烷,抽滤,减压蒸馏除去二氯甲烷后,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=3:1。得到淡黄色油状产物14.4mg,产率16.4%。结构如下:1H-NMR(600MHz,CDCl3)δ7.96(d,J=4.7Hz,2H),7.90(d,J=7.1Hz,1H),7.82(s,1H),7.70(dd,J=5.7,3.2Hz,1H),7.69(s,1H),7.64(s,1H),7.57(d,J=7.5Hz,1H),7.54(d,J=7.8Hz,2H),7.51(dd,J=5.8,3.2Hz,1H),1.57–1.54(m,5H),1.35–1.32(m,6H),1.10–1.05(m,6H),0.89(t,J=7.3Hz,11H).
实施例7:合成标记前体化合物7
将中间体化合物3(51.5mg,0.14mmol),四三苯基膦钯(23.4mg,0.02mmol)和正六丁基二锡(0.32g,0.55mmol)溶于10mL甲苯中,氮气保护,110℃反应过夜,反应完毕后,减压蒸馏除去甲苯后,加入二氯甲烷,抽滤,减压蒸馏除去二氯甲烷后,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=8:1。得到淡黄色油状产物21mg,产率28.1%。结构如下:1H-NMR(400MHz,CDCl3)δ10.06(s,1H),8.71(d,J=5.5Hz,1H),8.14(d,J=7.3Hz,1H),7.96(d,J=8.0Hz,2H),7.92(s,1H),7.58(dd,J=12.6,6.4Hz,3H),7.05(d,J=7.2Hz,1H),1.58–1.53(m,5H),1.33(t,J=8.3Hz,6H),1.11–1.05(m,5H),0.89(t,J=7.3Hz,11H).
实施例8:合成化合物8
将化合物2-氨基喹啉(100.7mg,0.7mmol),2'-溴-4-碘苯乙酮(152.8mg,0.7mmol)和NaHCO3(67.0mg,0.8mmol)溶于30mL乙醇中,然后用90℃油浴加热回流7小时,反应完毕后,减压蒸馏除去乙醇,加入水,并用乙酸乙酯萃取三次,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比乙酸乙酯:甲醇=10:1,得到黄色固体133.9mg。产率51.4%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ9.17(s,1H),8.30(d,J=8.4Hz,1H),7.95(d,J=7.7Hz,1H),7.79(s,4H),7.72(dd,J=14.7,8.7Hz,2H),7.52(dd,J=15.7,8.4Hz,2H).
实施例9:合成标记前体化合物9
将中间体化合物8(78.3mg,0.21mmol),四三苯基膦钯(37.6mg,0.032mmol)和正六丁基二锡(0.48g,0.84mmol)溶于8mL甲苯中,氮气保护,110℃反应过夜,反应完毕后,减压蒸馏除去甲苯后,加入二氯甲烷,抽滤,减压蒸馏除去二氯甲烷后,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=3:1。得到淡黄色固体18.1mg,产率16.1%。结构如下:1H-NMR(400MHz,CDCl3)δ8.30(s,1H),7.94(t,J=7.5Hz,3H),7.78(d,J=7.9Hz,1H),7.62(dd,J=16.4,8.3Hz,2H),7.55(d,J=8.0Hz,2H),7.50(d,J=9.5Hz,1H),7.44(t,J=7.5Hz,1H),1.59(s,4H),1.37(d,J=7.3Hz,6H),1.09(s,3H),0.91(q,J=7.5Hz,14H).
实施例10:合成标记前体化合物10
按照实施例1合成方法,合成标记前体化合物10,得到白色固体46.6mg,产率42.8%。结构如下:1H-NMR(400MHz,CDCl3)δ8.99(dd,J=4.5,1.6Hz,1H),8.14(d,J=8.1Hz,2H),8.02(dd,J=8.0,1.5Hz,1H),7.99(d,J=7.1Hz,1H),7.97(s,1H),7.88(d,J=8.1Hz,2H),7.49(dd,J=8.1,4.5Hz,1H),7.01(d,J=7.1Hz,1H),1.36(s,12H).
实施例11:合成中间体化合物11
将化合物8-氨基-1,7-萘啶(145.2mg,1mmol),2'-溴-4-羟基苯乙酮(258.7mg,1.2mmol)和NaHCO3(168.4mg,2mmol)溶于20mL乙醇中,然后用90℃油浴加热回流10小时,反应完毕后,减压蒸馏除去乙醇,加入水,并用乙酸乙酯萃取三次,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比为乙酸乙酯:石油醚=5:1,得到淡黄色固体101.9mg。产率42.1%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.95(dd,J=4.4,1.6Hz,1H),8.51(d,J=7.1Hz,1H),8.43(s,1H),8.38(dd,J=8.1,1.6Hz,1H),7.93–7.89(m,2H),7.70(dd,J=8.1,4.5Hz,1H),7.34(d,J=7.1Hz,1H),6.96–6.90(m,2H).
实施例12:合成化合物12
将中间体化合物11(50.2mg,0.23mmol),1-溴-2-氟乙烷(88.6mg,0.69mmol)和碳酸铯(0.6g,1.84mmol),溶于4mL DMF中,80℃反应13小时,减压蒸馏除去DMF,加入二氯甲烷,超声后抽滤除去碳酸铯,减压蒸馏除去二氯甲烷后,柱层析分离,展开剂体积比为乙酸乙酯:石油醚=1:4,得到淡黄色固体29.2mg,产率为41.3%。结构如下:1H-NMR(600MHz,CDCl3)δ8.99(dd,J=4.5,1.5Hz,1H),8.05–8.01(m,4H),7.91(s,1H),7.50(dd,J=8.0,4.5Hz,1H),7.02(d,J=7.2Hz,1H),6.95(d,J=8.7Hz,2H),4.83–4.80(m,1H),4.75–4.71(m,1H),4.28–4.25(m,1H),4.24–4.21(m,1H).
实施例13:合成中间体化合物13
将中间体化合物11(50.3mg,0.23mmol),溴乙醇(88.3mg,0.69mmol)和碳酸铯(0.6g,1.84mmol),溶于4mL DMF中,80℃反应11小时,减压蒸馏除去DMF,加入水并用乙酸乙酯萃取,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比为乙酸乙酯:石油醚=6:1,得到黄色固体44.3mg,产率为63.1%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.86(dd,J=4.4,1.6Hz,1H),8.39(d,J=7.2Hz,1H),8.35(s,1H),8.25(dd,J=8.0,1.6Hz,1H),7.94–7.88(m,2H),7.59(dd,J=8.0,4.5Hz,1H),7.22(d,J=7.2Hz,1H),7.03–6.97(m,2H),4.01(t,J=5.0Hz,2H),3.70(t,J=4.9Hz,2H).
实施例14:合成中间体化合物14
将中间体化合物11(457.3mg,2mmol),2-(2-氯乙氧基)乙醇(752.2mg,6mmol)和碳酸铯(5g,15mmol),溶于8mL DMF中,80℃反应6小时,减压蒸馏除去DMF,加入水并用乙酸乙酯萃取,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比为乙酸乙酯:甲醇=9:1,得到橘色固体169.2mg,产率为24.3%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.81(dd,J=4.4,1.6Hz,1H),8.34(d,J=7.1Hz,1H),8.30(s,1H),8.20(dd,J=8.1,1.6Hz,1H),7.86(d,J=8.7Hz,2H),7.54(dd,J=8.1,4.5Hz,1H),7.17(d,J=7.2Hz,1H),6.96(d,J=8.9Hz,2H),4.06(dd,J=5.4,3.9Hz,2H),3.68(dd,J=5.2,3.9Hz,2H),3.43(s,4H).
实施例15:合成中间体化合物15
将中间体化合物11(260.6mg,1.2mmol),2-[2-(2-氯乙氧基)乙氧基]乙醇(604.8mg,3.6mmol)和碳酸铯(2.7g,8mmol),溶于6mL DMF,80℃反应11小时,减压蒸馏除去DMF,加入水并用乙酸乙酯萃取,减压蒸馏除去乙酸乙酯后,柱层析分离,展开剂体积比为乙酸乙酯:甲醇=9:1,得到无色油状产物212.2mg,产率为45.1%。结构如下:1H-NMR(400MHz,CDCl3)δ8.98(dd,J=4.5,1.6Hz,1H),8.02(dd,J=8.0,5.7Hz,4H),7.89(s,1H),7.49(dd,J=8.1,4.5Hz,1H),7.01(d,J=7.2Hz,1H),6.95(d,J=8.8Hz,2H),4.19–4.15(m,2H),3.90–3.86(m,2H),3.75–3.73(m,4H),3.66–3.60(m,4H).
实施例16:合成标记前体化合物16
将中间体化合物13(95.9mg,0.31mmol),对甲苯磺酰氯(70.3mg,0.36mmol),三乙胺(0.15mL,2mmol)溶于5mL二氯甲烷中,室温反应6小时,反应结束后减压蒸馏除去二氯甲烷,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=1:7,得到粉白色固体29.4mg,产率为20%。结构如下:1H-NMR(400MHz,CDCl3)δ9.04(dd,J=4.4,1.5Hz,1H),8.19(d,J=7.2Hz,2H),8.13(s,1H),7.97(d,J=8.6Hz,2H),7.83(d,J=8.3Hz,2H),7.59(dd,J=8.1,4.5Hz,1H),7.36(d,J=8.2Hz,2H),7.14(d,J=7.0Hz,1H),6.67(d,J=8.5Hz,2H),4.35(dd,J=5.4,3.7Hz,2H),4.12–4.06(m,2H),2.46(s,3H).
实施例17:合成标记前体化合物17
将中间体化合物14(150.4mg,0.43mmol),对甲苯磺酰氯(98.9mg,0.52mmol),三乙胺(0.2mL,2.5mmol)溶于6mL二氯甲烷中,室温反应5小时,反应结束后减压蒸馏除去二氯甲烷,柱层析分离,展开剂体积比为石油醚:乙酸乙酯=1:9,得到白色固体57.1mg,产率为26.3%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.91(dd,J=4.5,1.7Hz,1H),8.46–8.39(m,2H),8.30(dd,J=8.1,1.6Hz,1H),7.95(d,J=8.7Hz,2H),7.78(d,J=8.3Hz,2H),7.63(dd,J=8.0,4.5Hz,1H),7.44(d,J=8.1Hz,2H),7.27(d,J=7.2Hz,1H),7.02(d,J=8.8Hz,2H),4.19–4.13(m,2H),4.09–4.04(m,2H),3.72–3.64(m,4H),2.37(s,3H).
实施例18:合成标记前体化合物18
将中间体化合物14(240.6mg,0.61mmol),对甲苯磺酰氯(139.4mg,0.73mmol),三乙胺(0.3mL,2.8mmol)溶于6mL二氯甲烷中,室温反应5小时,反应结束后减压蒸馏除去二氯甲烷,柱层析分离,展开剂体积比为乙酸乙酯:甲醇=12:1,得到浅黄色固体116.1mg,产率为35.3%。结构如下:1H-NMR(400MHz,CDCl3)δ8.97(dd,J=4.5,1.6Hz,1H),8.97(dd,J=4.5,1.6Hz,1H),8.03–7.95(m,5H),7.81(s,1H),7.77(d,J=8.3Hz,2H),7.47(dd,J=7.9,4.5Hz,1H),7.30(d,J=8.2Hz,2H),6.96(dd,J=7.8,5.7Hz,3H),4.15(dd,J=8.5,3.7Hz,5H),3.85–3.81(m,2H),3.70–3.67(m,2H),3.67–3.64(m,2H),3.63–3.58(m,2H),2.40(s,3H).
实施例19:合成化合物19
将合成前体化合物17(25.3mg,0.05mmol)和TBAF(0.25mL,0.25mmol)在5mL无水四氢呋喃中,60℃反应2小时,反应完毕后,减压蒸馏除去四氢呋喃,柱层析分离,展开剂体积比二氯甲烷:甲醇=12:1,得到黄色固体14mg,产率81.6%。结构如下:1H-NMR(400MHz,CDCl3)δ8.98(dd,J=4.5,1.6Hz,1H),8.01(ddd,J=5.2,3.9,2.2Hz,4H),7.87(s,1H),7.48(dd,J=8.1,4.5Hz,1H),7.00(d,J=7.2Hz,1H),6.95(d,J=8.9Hz,2H),4.68–4.64(m,1H),4.55–4.52(m,1H),4.20–4.15(m,2H),3.92–3.89(m,2H),3.89–3.85(m,1H),3.81–3.78(m,1H).
实施例20:合成化合物20
将合成前体化合17(61.6mg,0.11mmol)和TBAF(1mL,1mmol)在5mL无水四氢呋喃中,60℃反应3小时,反应完毕后,减压蒸馏除去四氢呋喃,柱层析分离,展开剂体积比二氯甲烷:乙酸乙酯:甲醇=12:4:1,得到黄色固体12.5mg,产率31.6%。结构如下:1H-NMR(400MHz,CDCl3)δ8.96(dd,J=4.5,1.5Hz,1H),7.99(dd,J=10.5,4.2Hz,3H),7.95(d,J=7.2Hz,1H),7.79(s,1H),7.46(dd,J=8.0,4.5Hz,1H),6.96(d,J=7.2Hz,3H),4.63–4.58(m,1H),4.52–4.46(m,1H),4.19–4.15(m,2H),3.90–3.85(m,2H),3.80–3.77(m,1H),3.73–3.68(m,4H),3.62(t,J=5.8Hz,1H).
以上实施例1-20化合物的合成过程示意图见图1。
实施例21:合成中间体化合物21
将化合物8-氨基-1,7-萘啶(290.4mg,1mmol),3-(2-溴乙酰基)氧化吡啶(518.3mg,2.4mmol)和NaHCO3(252.5mg,3mmol)溶于20mL乙醇中,然后用90℃油浴加热回流9小时,反应完毕后,减压蒸馏除去乙醇,柱层析分离,展开剂体积比为乙酸乙酯:甲醇=7:3,得到黄色固体173.5mg。产率33.5%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.90(dd,J=4.4,1.5Hz,1H),8.80(s,1H),8.67(s,1H),8.43(d,J=7.2Hz,1H),8.30(dd,J=8.1,1.4Hz,1H),8.15(d,J=6.4Hz,1H),7.92(d,J=7.9Hz,1H),7.64(dd,J=8.0,4.4Hz,1H),7.49(dd,J=7.8,6.6Hz,1H),7.30(d,J=7.2Hz,1H).
实施例22:合成标记前体化合物22
将化合物21(131.1mg,0.5mmol)溶于3mL二氯甲烷,然后将三甲胺(1.5mL,3mmol)和三氟乙酸酐(315.7mg,1.5mmol)依次加入反应液中,室温搅拌半小时,反应结束后,加入水,将水相减压蒸馏除去后,加入乙醚和乙腈超声洗涤,然后离心得到下层棕黄色固体137.6mg,产率为75.7%。结构如下:1H-NMR(600MHz,(CD3)2SO)δ9.29(d,J=2.3Hz,1H),8.94(d,J=4.5Hz,1H),8.77(dd,J=8.6,2.1Hz,1H),8.57(s,1H),8.36(d,J=7.2Hz,1H),8.30(d,J=8.1Hz,1H),8.05(d,J=8.7Hz,1H),7.68(dd,J=8.0,4.5Hz,1H),7.30(d,J=7.2Hz,1H),3.68(s,9H).
实施例23:合成化合物23
将化合物22(30.0mg,0.07mmol)和四丁基氟化铵(0.2mL,0.21mmol)溶于5mL乙腈中,60℃反应两小时,反应结束后,柱层析分离,展开剂比例为乙酸乙酯:甲醇=10:1,得到浅黄色产物13.3mg,产率为67.3%。结构如下:1H-NMR(600MHz,(CD3)2SO)δ8.89(dd,J=4.4,1.2Hz,1H),8.84(d,J=2.0Hz,1H),8.57(s,1H),8.53(td,J=8.2,2.3Hz,1H),8.44(d,J=7.1Hz,1H),8.29(dd,J=8.1,1.0Hz,1H),7.63(dd,J=8.0,4.4Hz,1H),7.30–7.26(m,2H).
实施例24:合成中间体化合物24
以中间体化合物4(131.3mg,0.5mmol)为原料,溶于40mL二氯甲烷,加入mCPBA(127.2mg,0.75mmol),室温反应3小时,减压蒸馏除去二氯甲烷。得到浅黄色固体41.5mg,产率为50.2%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.53–8.47(m,3H),8.04(dd,J=8.7,5.6Hz,2H),7.77(d,J=8.0Hz,1H),7.52(dd,J=8.1,6.4Hz,1H),7.32–7.26(m,3H).
实施例25:合成标记前体化合物25
按照实施例22的合成方法以中间体化合物24为原料合成标记前体化合物25。得到棕白色固体26.1mg,产率为68.6%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.74(d,J=8.8Hz,1H),8.61(d,J=4.5Hz,2H),8.31(d,J=8.8Hz,1H),8.10–8.03(m,2H),7.43(d,J=7.1Hz,1H),7.30(t,J=8.1Hz,2H),3.71(s,9H).
实施例26:合成化合物26
按照实施例22的合成方法,以标记前体化合物25为原料合成化合物26,得到白色固体9.7mg,产率为78.5%。结构如下:1H-NMR(600MHz,CDCl3)δ8.16–8.12(m,1H),8.07(dd,J=8.9,5.4Hz,2H),8.03(d,J=7.1Hz,1H),7.90(s,1H),7.16(dd,J=8.5,2.7Hz,1H),7.12(t,J=8.7Hz,2H),7.05(d,J=7.1Hz,1H).
实施例27:合成中间体化合物27
按照实施例1的合成方法,以8-氨基-1,7-萘啶和5-(2-溴乙酰基)-2-氯吡啶为原料合成中间体化合物34,得到白色产物172.8mg,产率为61.3%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ9.06(d,J=2.0Hz,1H),8.93(d,J=4.5Hz,1H),8.67(s,1H),8.48(d,J=7.2Hz,1H),8.44(dd,J=8.5,1.5Hz,1H),8.33(d,J=8.0Hz,1H),7.67(dd,J=7.7,4.5Hz,1H),7.63(d,J=8.3Hz,1H),7.33(d,J=7.0Hz,1H).
实施例28:合成中间体化合物28
将化合物28(30.9mg,0.1mmol)溶于6mL DMF,再向其中加入NaH(50.1mg,1.25mmol)冰浴搅拌半小时后,加入二乙二醇(3mL,5mmol),加热130℃,3小时后,加入水淬灭反应,加入二氯甲烷萃取,减压蒸馏除去二氯甲烷,柱层析分离,展开剂体积比为乙酸乙酯:二氯甲烷:甲醇=10:2:1。得到产物18.1mg,产率为51.7%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.88(dd,J=4.5,1.6Hz,1H),8.77(d,J=2.4Hz,1H),8.46(s,1H),8.43(d,J=7.1Hz,1H),8.30–8.24(m,2H),7.61(dd,J=7.3,3.7Hz,1H),7.26(d,J=7.2Hz,1H),6.92(d,J=8.6Hz,1H),4.42–4.37(m,2H),3.76–3.72(m,2H),3.47(t,J=3.6Hz,4H).
实施例29:合成标记前体化合物29
按照实施例16的合成方法以中间体化合物28为原料合成标记前体化合物29,得到白色产物50.3mg,产率66.7%。结构如下:1H-NMR(600MHz,CDCl3)δ9.01(dd,J=4.5,1.4Hz,1H),8.75(d,J=2.4Hz,1H),8.42(dd,J=8.6,2.3Hz,1H),8.07(t,J=8.2Hz,2H),7.98(s,1H),7.79(d,J=8.2Hz,2H),7.54(dd,J=8.0,4.5Hz,1H),7.30(d,J=8.4Hz,2H),7.08(d,J=7.2Hz,1H),6.81(d,J=8.6Hz,1H),4.44–4.40(m,2H),4.22–4.18(m,2H),3.80–3.77(m,2H),3.76–3.73(m,2H),2.40(s,3H).
实施例30:化合物30
将合成前体化合物29(25.7mg,0.05mmol)和TBAF(0.25mL,0.25mmol)在5mL无水四氢呋喃中,60℃反应2小时,反应完毕后,减压蒸馏除去四氢呋喃,柱层析分离,展开剂体积比二氯甲烷:甲醇=12:1,得到黄色固体14.1mg,产率81.6%。结构如下:1H-NMR(400MHz,CDCl3)δ9.01(dd,J=4.5,1.4Hz,1H),8.69(d,J=2.1Hz,1H),8.32(dd,J=8.6,2.4Hz,1H),8.07(dd,J=8.2,1.6Hz,1H),8.06–8.02(m,1H),7.94(s,1H),7.55(dd,J=8.0,4.5Hz,1H),7.09(d,J=7.2Hz,1H),6.79(d,J=8.6Hz,1H),4.68–4.65(m,1H),4.57–4.53(m,1H),4.52–4.48(m,2H),3.93–3.89(m,2H),3.88–3.85(m,1H),3.81–3.77(m,1H).
以上实施例21-30化合物的合成过程示意图见图2。
实施例31:合成中间体化合物31
按照实施例1的合成方法,合成中间体化合物31,得到产物167.9mg,产率约为62.7%。未经纯化,直接进行下一步反应。
实施例32:合成中间体化合物32
将中间体化合物31(1.2g,3mmol)溶于10mL二氯甲烷中,再向其中加入5mL三氟乙酸,室温反应3小时,反应结束后,减压蒸馏除去二氯甲烷和三氟乙酸,加入乙醚,抽滤得到白色固体680.1mg,产率约为91.3%。未经纯化,直接进行下一步反应。
实施例33:合成中间体化合物33
将中间体化合物32(490.3mg,2mmol),3-溴-1-丙醇(1.9g,12mmol)和碳酸铯(3.3g,10mmol)溶于25mL乙腈中,90℃过夜,得到淡黄色固体86.3mg,产率约为14.0%。未经纯化,直接进行下一步反应。
实施例34:合成化合物34
按照实施例33合成方法,合成化合物34,得到浅黄色固体16.7mg,产率为17.9%。结构如下:1H-NMR(600MHz,CDCl3)δ8.92(dd,J=4.5,1.5Hz,1H),7.97(dd,J=8.1,1.4Hz,1H),7.91(d,J=7.0Hz,1H),7.44(dd,J=8.0,4.6Hz,1H),7.35(s,1H),6.96–6.90(m,1H),4.55(t,J=6.1Hz,1H),4.47(t,J=6.0Hz,1H),3.02(d,J=11.2Hz,2H),2.90(tt,J=11.7,3.5Hz,1H),2.51(t,J=7.4Hz,2H),2.24(d,J=12.6Hz,2H),2.14(t,J=11.2Hz,2H),1.98–1.86(m,2H),1.85–1.76(m,2H).
实施例35:合成标记前体化合物35
按照实施例16的合成方法,合成标记前体化合物35,得到白色固体12.5mg,产率为10.0%。结构如下:1H-NMR(600MHz,CD3OD)δ8.94(dd,J=4.5,1.5Hz,1H),8.01(dd,J=8.0,1.5Hz,1H),7.97(d,J=7.0Hz,1H),7.80(d,J=8.0Hz,2H),7.61(s,1H),7.48(dd,J=8.0,4.4Hz,1H),7.13(d,J=8.0Hz,2H),6.97(d,J=7.2Hz,1H),4.56(t,J=8.4Hz,2H),4.38(t,J=8.3Hz,2H),3.90(s,2H),3.88(d,J=3.4Hz,1H),2.76–2.69(m,2H),2.44(s,1H),2.32(s,4H),1.71(s,3H).
实施例36:合成中间体化合物36
按照实施例1的合成方法,以8-氨基-1,7-萘啶和氯乙醛为原料合成中间体化合物36。得到白色产物177.5mg,产率为71.3%。结构如下:1H-NMR(600MHz,CD3OD)δ8.94(dd,J=4.3,1.3Hz,1H),8.01–7.98(m,2H),7.70(s,1H),7.63(d,J=0.9Hz,1H),7.47(dd,J=8.0,4.5Hz,1H),6.99(d,J=7.2Hz,1H).
实施例37:合成中间体化合物37
按照实施例24的合成方法,以中间体化合物36为原料,合成中间体化合物37。得到白色固体237.9mg,产率为87.8%。未经纯化,直接进行下一步反应。
实施例38:合成标记前体化合物38
按照实施例22的合成方法,以中间体化合物37为原料,合成标记前体化合物38。的得到白色粉末209.7mg,产率为49.1%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.75(d,J=8.9Hz,1H),8.64(d,J=7.2Hz,1H),8.30(d,J=8.8Hz,1H),8.19(s,1H),7.75(s,1H),7.43(d,J=7.2Hz,1H),3.68(s,9H).
实施例39:合成化合物39
按照实施例23的合成方法,以标记前体化合物38为原料,合成化合物39。得到白色固体36.2mg,产率50.3%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.48(dd,J=12.9,7.2Hz,2H),8.07(s,1H),7.63(s,1H),7.40(d,J=8.5Hz,1H),7.30(d,J=7.0Hz,1H).
以上实施例31-39化合物的合成过程示意图见图3。
实施例40:合称中间体化合物40
以2-氨基-3-硝基-4-甲基吡啶(1.5g,10mmol)和氯乙醛(1.5g,30mmol)溶于25mL乙醇中,回流3小时后,减压蒸馏除去溶剂,加入100mL水并用二氯甲烷萃取三次,减压蒸馏除去溶剂,得到黄色固体粗产物,未作鉴定直接投下一步反应。
实施例41:合成中间体化合物41
以中间体化合物40(870.4mg,5mmol)为原料,和N,N-二甲基甲酰胺二甲基缩醛(1.2g,10mmol)溶于15mL DMF中,130℃反应2小时后,减压蒸馏除去溶剂,加入100mL水并用二氯甲烷萃取三次,减压蒸馏除去溶剂,得到深红色固体粗产物,未作鉴定直接投下一步反应。
实施例42:合成中间体化合物42
将中间体化合物41(1.2g,5mmol)和高碘酸钠(5.0g,21mmol)溶于45mL THF/45mL水中,室温反应24小时后,减压蒸馏除去溶剂,加入100mL水并用二氯甲烷萃取三次,减压蒸馏除去溶剂,得到黄色固体粗产物,未做鉴定直接投下一步反应。
实施例43:合成中间体化合物43
将中间体化合物42(900.4mg,5mmol)和铁粉(560.2mg,10mmol)溶于30mL乙醇/3mL水中,向搅拌的溶液中滴加五滴浓盐酸,回流反应3小时后,抽滤,减压蒸馏除去大部分溶剂,加入饱和碳酸氢钠溶液中和至pH为中性时,加入100mL水并用二氯甲烷萃取三次,减压蒸馏除去溶剂,得到淡黄色固体中间体化合物53(388.2mg,2.5mmol),产率51.4%。结构如下:1H-NMR(400MHz,CDCl3)δ9.80(s,1H),7.58(d,J=0.6Hz,1H),7.52(d,J=0.7Hz,1H),7.44(d,J=6.9Hz,1H),6.83(d,J=7.0Hz,1H).
实施例44:合成化合物44
将中间体化合物43(155.1mg,1mmol)和对碘苯乙酮(258.6mg,1mmol)溶于30mL乙醇中,加入3g氢氧化钾,回流反应6小时后,加入1M盐酸中和至中性,减压蒸馏除去溶剂,柱层析分离,展开剂为乙酸乙酯:二氯甲烷:甲醇=8:2:1,得到淡黄色固体(100.9mg,0.27mmol),产率27.2%,结构如下:1H-NMR(400MHz,CDCl3)δ8.34–8.31(m,2H),8.07(d,J=8.4Hz,1H),7.99(dd,J=7.8,3.6Hz,2H),7.75(d,J=1.2Hz,1H),7.65(d,J=1.2Hz,1H),7.49(d,J=7.5Hz,1H),7.03(d,J=7.1Hz,1H).
实施例45:合成前体化合物45
按照实施例5的合成方法,以中间体化合物44为原料,合成标记前体化合物45,得到淡黄色固体20.3mg,产率为39.1%。结构如下:1H-NMR(400MHz,CDCl3)δ8.25(d,J=8.1Hz,2H),8.05(d,J=8.4Hz,1H),7.97(d,J=7.3Hz,2H),7.74(d,J=1.2Hz,1H),7.64(d,J=1.2Hz,1H),7.59(d,J=8.1Hz,2H),7.02(d,J=7.1Hz,1H),1.58–1.54(m,4H),1.36–1.31(m,4H),1.08(d,J=6.3Hz,7H),0.93–0.88(m,12H).
实施例46:合成中间体化合物46
按照实施例40的合成方法,以2-甲基-3-硝基-6-氨基吡啶原料,合成中间体化合物57,得到黄色固体粗产物,未做纯化鉴定直接投下一步反应。
实施例47:合成中间体化合物47
按照实施例41的合成方法,以中间体化合物46为原料,合成中间体化合物47,得到深红色固体粗产物,未做纯化鉴定直接投下一步反应。
实施例48:合成中间体化合物48
按照实施例42的合成方法,以中间体化合物47为原料,合成中间体化合物59,得到棕黄色固体粗产物,未做纯化鉴定直接投下一步反应。
实施例49:合成中间体化合物49
按照实施例43的合成方法,以中间体化合物48为原料,合成中间体化合物49,得到黄色固体97.3mg,产率42.1%。结构如下:1H-NMR(400MHz,CD3OD)δ10.19(s,1H),7.62(d,J=9.6Hz,1H),7.41(d,J=1.0Hz,1H),6.87(d,J=9.6Hz,1H).
实施例50:合成化合物50
按照实施例44的合成方法,以中间体化合物49为原料,合成化合物50,得到黄绿色固体12.6mg,产率17.3%。结构如下:1H-NMR(600MHz,(CD3)2SO)δ8.87(d,J=8.7Hz,1H),8.73(s,1H),8.31(dd,J=8.7,2.0Hz,1H),8.22(d,J=7.4Hz,1H),8.03(d,J=8.3Hz,1H),7.89(d,J=8.3Hz,1H),7.81(d,J=9.6Hz,1H),7.76(t,J=9.9Hz,1H),7.68(s,1H),7.53(t,J=7.5Hz,1H).
实施例51:合成前体化合物51
按照实施例45的合成方法,以化合物50为原料,合成前体化合物51,得到淡黄色固体8.0mg,产率为22.8%。结构如下:1H-NMR(600MHz,CDCl3)δ8.28(d,J=8.7Hz,1H),8.07–8.03(m,4H),7.99(d,J=8.7Hz,1H),7.82(t,J=9.7Hz,3H),7.36(d,J=4.3Hz,1H),1.61–1.54(m,4H),1.39–1.32(m,5H),1.13–1.07(m,9H),0.90(dd,J=12.1,5.0Hz,8H).
以上实施例40-51化合物的合成过程示意图见图4。
实施例52:合成化合物52
按照实施例1的合成方法,以8-氨基-1,7-萘啶和α-溴代间氟苯乙酮为原料,得到淡黄色固体33.2mg,产率47.2%,结构如下:1H-NMR(600MHz,CDCl3)δ9.00(d,J=4.3Hz,1H),8.01(d,J=7.8Hz,1H),7.98(d,J=7.1Hz,1H),7.89(s,1H),7.85(d,J=7.8Hz,2H),7.49(dd,J=8.0,4.5Hz,1H),7.38–7.34(m,1H),7.00(d,J=7.0Hz,2H).
实施例53:合成化合物53
按照实施例1的合成方法,以8-氨基-1,7-萘啶和α-溴代间碘苯乙酮为原料,得到棕黄色固体12.1mg,产率30.9%,结构如下:1H-NMR(600MHz,CDCl3)δ9.00(s,1H),8.53(s,1H),8.03(d,J=7.8Hz,2H),7.99(d,J=7.1Hz,1H),7.90(s,1H),7.63(d,J=7.7Hz,1H),7.51(s,1H),7.14(t,J=7.7Hz,1H),7.01(s,1H).
实施例54:合成化合物54
按照实施例1的合成方法,以4-氨基喹唑啉和2'-溴-4-碘苯乙酮为原料,得到土黄色固体29.2mg,产率33.0%。结构如下:1H-NMR(400MHz,(CD3)2SO)δ9.24(s,1H),8.53(s,1H),8.43(d,J=7.7Hz,1H),7.90(d,J=8.1Hz,1H),7.82(s,4H),7.75–7.68(m,2H).
实施例55:合成前体化合物55
按照实施例5的合成方法,以中间体化合物53为原料,合成标记前体化合物55,得到淡黄色固体6.3mg,产率为27.7%。结构如下:1H-NMR(400MHz,CDCl3)δ8.99(dd,J=4.5,1.6Hz,1H),8.14(s,1H),8.08(d,J=7.3Hz,1H),8.02(d,J=7.3Hz,2H),7.93(s,1H),7.51–7.47(m,1H),7.41(d,J=2.2Hz,1H),7.38(d,J=7.2Hz,1H),7.01(d,J=7.1Hz,1H),1.61–1.50(m,6H),1.36–1.30(m,6H),1.12–1.08(m,4H),0.92–0.85(m,11H).
实施例56:合成前体化合物56
按照实施例5的合成方法,以中间体化合物54为原料,合成标记前体化合物56,得到淡黄色固体11.3mg,产率为35.9%。结构如下:1H-NMR(400MHz,CDCl3)δ8.88(s,1H),8.67(s,1H),7.99–7.92(m,3H),7.89(s,1H),7.68(t,J=7.0Hz,2H),7.56(d,J=8.0Hz,2H),1.59(d,J=7.2Hz,8H),1.38–1.32(m,8H),1.10(dd,J=10.1,4.6Hz,5H),0.95–0.88(m,6H).
实施例57:合成前体化合物57
以53(285.1mg,0.75mmol),过氧单磺酸钾(300.4mg,1mmol),6.10-二氧杂螺[4.5]十烷-7,9-二酮(192.5mg,1.1mmol)为原料,先将53和过氧单磺酸钾溶于6mL氯仿中,滴加3.5mL TFA,室温搅拌半小时,反应结束后,减压蒸馏除去溶剂,溶于乙醇中,加入酮,用碳酸氢钠饱和溶液调节溶液pH直至大于10,室温反应3小时,减压蒸馏除去溶剂,加入20mL水,用二氯甲烷萃取三次,减压蒸馏除去溶剂,柱层析分离,展开剂体系为乙酸乙酯:二氯甲烷:甲醇=8:4:1,得到白色固体19.4mg,产率5.1%。结构如下:1H-NMR(400MHz,CDCl3)δ8.99(s,1H),8.60(s,1H),8.24(s,1H),8.03(dd,J=18.1,7.5Hz,2H),7.95(s,1H),7.70(d,J=6.2Hz,1H),7.53(dd,J=7.0,4.1Hz,1H),7.41(s,1H),7.05(d,J=7.0Hz,1H),2.17(s,4H),1.79(s,4H).
实施例58:合成前体化合物58
按照实施例57的合成方法,以化合物1为原料,合成标记前体化合物58,得到淡黄色固体21.9mg,产率为8.3%。结构如下:1H-NMR(400MHz,CDCl3)δ9.01(d,J=4.6Hz,1H),8.14(d,J=8.4Hz,2H),8.06(d,J=8.1Hz,1H),8.03–7.98(m,2H),7.92(d,J=8.4Hz,2H),7.54(dd,J=8.0,4.6Hz,1H),7.06(d,J=7.3Hz,1H),2.16(s,4H),1.79(s,4H).
实施例59:合成中间体化合物59
以中间体化合物36(281.3mg,1.7mmol),N-溴代琥珀酰亚胺(600.9mg,3.5mmol)为原料,溶于20mL乙腈中,滴加TMS-OTf(390.9mg,1.8mmol),40℃反应半小时,得到淡黄色固体400.3mg,产率93.9%,结构如下:1H-NMR(400MHz,(CD3)2SO)δ8.91(dd,J=4.5,1.6Hz,1H),8.36(dd,J=8.1,1.6Hz,1H),8.27(d,J=7.3Hz,1H),7.76(s,1H),7.66(dd,J=8.1,4.5Hz,1H),7.43(d,J=7.3Hz,1H).
实施例60:合成化合物60
以中间体化合物59(204.1mg,0.8mmol),4-碘苯硼酸(202.3mg,1mmol)为原料,溶于15mL二氧六环中,加入二(三苯基膦)氯化钯(49.5mg,0.07mmol)和碳酸钾(350.8mg,2.5mmol),氮气保护,110℃过夜,反应完毕,减压蒸馏除去溶剂,柱层析分离,展开剂为乙酸乙酯:二氯甲烷=1:1,得到淡黄色固体67.7mg,产率22.5%,结构如下:1H-NMR(400MHz,CDCl3)δ8.99(dd,J=4.5,1.6Hz,1H),8.10(d,J=7.3Hz,1H),8.04(dd,J=8.0,1.6Hz,1H),7.88(d,J=8.5Hz,2H),7.76(s,1H),7.51(dd,J=8.1,4.5Hz,1H),7.33(d,J=8.4Hz,2H),7.04(d,J=7.4Hz,1H).
实施例61:合成前体化合物61
按照实施例5的合成方法,以中间体化合物60为原料,合成标记前体化合物61,得到淡黄色固体,9.0mg,产率为29.9%。结构如下:1H-NMR(400MHz,CDCl3)δ8.98(d,J=4.4Hz,1H),8.20(d,J=7.3Hz,1H),8.02(d,J=8.0Hz,1H),7.76(s,1H),7.63(d,J=7.8Hz,2H),7.53(d,J=7.2Hz,3H),7.01(d,J=7.4Hz,1H),1.61–1.55(m,6H),1.36(d,J=7.3Hz,6H),1.12(d,J=8.4Hz,5H),0.90(t,J=7.3Hz,10H).
以上实施例59-61化合物的合成过程示意图见图5。
实施例62:125I标记化合物的制备
(a)化合物[125I]1,[125I]2,[125I]3,[125I]8,[125I]44,[125I]50,[125I]53,[125I]54和[125I]60的制备
将0.1mg标记前体化合物(分别为化合物5,6,7,9,45,51,55,56和61),溶于100μL乙醇中,加入约70μCi Na125I溶液,100μL盐酸(1M)和50μL 3%过氧化氢溶液,室温反应15分钟,加入NaHCO3,至pH为中性。然后通过HPLC分离纯化,分离条件为:Venusil MP C18色谱柱(5μm,4.6mm×250mm),收集目标产物流出液,氮气除去乙腈,将得到的产物配制成所需的溶液。
实施例63:18F标记化合物的制备
(1)化合物[18F]4的制备
(a)[18F]F-离子富集在QMA柱上,用3mL的甲醇冲洗QMA柱,然后用1mL淋洗液(含0.5mg TEAB,甲醇溶液)将[18F]F-从QMA柱上洗脱下来。取约20mCi的氟离子溶液加入到10mL玻璃反应管中,在120℃金属浴中加热,连续通入N2吹干,保证反应体系无水。将3.5mg标记前体化合物(化合物10)和6mg Cu(OTf)2(Py)4溶于100μL 1-丁醇和200μL DMA中,并将该溶液转移到含有[18F]F-的玻璃反应管中。在110℃条件下,加热反应20分钟。冷却后加入10mL去离子水稀释反应混合物。混合液通过一个经过预处理的Sep-Pak C18固相萃取小柱纯化,用20mL去离子水淋洗柱子去除未反应的[18F]F-及无机盐类。用1mL无水乙腈淋洗柱子,将吸附在柱子上的标记化合物及标记前体化合物等洗脱下来,浓缩后通过HPLC分离纯化,分离条件:Venusil MP C18反向柱(5μm,10mm×250mm),收集目标产物的流出液,氮气吹干溶剂,将得到的产物溶于10%乙醇并用纯净水配制成所需要的浓度。
(b)[18F]F-离子富集在QMA柱上,然后用1mL淋洗液(含TEAB 2mg,乙腈/水=7/3),将[18F]F-从QMA柱上洗脱下来。取约20mCi的氟离子溶液加入到10mL玻璃反应管中,在120℃金属浴中加热,连续通入N2吹干,保证反应体系无水。将2mg标记前体化合物(化合物58)溶于400μL DMF中,并将该溶液转移到含有[18F]F-的玻璃反应管中。在110℃条件下,加热反应10分钟。冷却后通过HPLC分离纯化,分离条件:Venusil MP C18反向柱(5μm,10mm×250mm),收集目标产物的流出液,氮气吹干溶剂,将得到的产物溶于10%乙醇并用纯净水配制成所需要的浓度。
(2)化合物[18F]12,[18F]19,[18F]20,[18F]40和[18F]34的制备
[18F]F-离子富集在QMA柱上,用1mL淋洗液(含Kryptofix-2.2.2 13mg,K2CO31.1mg,乙腈/水=4/1)将[18F]F-从QMA柱上洗脱下来。取约20mCi的氟离子溶液加入到10mL玻璃反应管中,在120℃金属浴中加热,连续通入N2吹干,保证反应体系无水。将1.5mg标记前体化合物(化合物16,17,18,29和35)溶于300μL无水乙腈中,并将该溶液转移到含有[18F]F-的玻璃反应管中。在100℃条件下,加热反应5-10分钟。冷却后,通过HPLC分离纯化,分离条件:Venusil MP C18反向柱(5μm,10mm×250mm),收集目标产物的流出液,氮气吹干溶剂,将得到的产物溶于10%乙醇并用纯净水配制成所需要的浓度。
(3)化合物[18F]23,[18F]26,和[18F]39的制备
[18F]F-离子富集在QMA柱上,用1mL淋洗液(含TBAB 6.8mg,乙腈/水=7/3)将[18F]F-从QMA柱上洗脱下来。取约20mCi的氟离子溶液加入到10mL玻璃反应管中,在120℃金属浴中加热,连续通入N2吹干,保证反应体系无水。将1mg标记前体化合物(化合物22,25和38)溶于300μL无水DMSO中,并将该溶液转移到含有[18F]F-的玻璃反应管中。在100℃条件下,加热反应6分钟。冷却后,通过HPLC分离纯化,分离条件:Venusil MP C18反向柱(5μm,10mm×250mm),收集目标产物的流出液,氮气吹干溶剂,将得到的产物溶于10%乙醇并用纯净水配制成所需要的浓度。
(4)化合物[18F]52的制备
[18F]F-离子富集在QMA柱上,然后用1mL淋洗液(含TEAB 2mg,乙腈/水=7/3),将[18F]F-从QMA柱上洗脱下来。取约20mCi的氟离子溶液加入到10mL玻璃反应管中,在120℃金属浴中加热,连续通入N2吹干,保证反应体系无水。将2mg标记前体化合物(化合物57)溶于400μL DMF中,并将该溶液转移到含有[18F]F-的玻璃反应管中。在110℃条件下,加热反应10分钟。冷却后通过HPLC分离纯化,分离条件:Venusil MP C18反向柱(5μm,10mm×250mm),收集目标产物的流出液,氮气吹干溶剂,将得到的产物溶于10%乙醇并用纯净水配制成所需要的浓度。
二实验结果
[125I]1,[125I]2,[125I]3,[18F]4,[125I]8,[18F]12,[18F]19,[18F]20,[18F]23,[18F]26,[18F]30,[18F]34,[18F]39,[125I]44,[125I]50,[18F]52,[125I]53,[125I]54和[125I]60的标记率如下,经HPLC分离纯化后,放射性化学纯度都大于95%。色谱柱为Venusil MP C18反向柱(5μm,10mm×250mm),流动相流速均为4mL/min,标记率如表1所示。
表1:标记化合物的标记率
实施例64:放射自显影实验
分别让一定浓度的标记产物(10%乙醇溶液)与AD病人脑切片在室温下孵育一定时间,孵育结束后,通过磷屏曝光,后用储磷屏系统分析图像。
一、实验步骤:
(1)预处理AD人脑切片;
(2)在AD人脑切片上覆盖5μCi/mL的125I标记的或20μCi/mL的18F标记的化合物溶液1mL,室温下孵育1.5小时或1小时;
(3)用50%乙醇溶液泡30分钟,或用50%乙醇冲洗5分钟;
(4)晾干后,保鲜膜包覆置于磷屏下曝光24小时(125I标记化合物)或1小时(18F标记化合物)后,用储磷屏系统分析图像。
二、实验结果:
实验结果如图6,图7和图8所示,充分说明本发明的化合物被放射性核素标记后,可以作为AD脑内Tau蛋白显像剂,在临床诊断中具有潜在的应用前景。
实施例65:正常小鼠体内生物分布实验
一、实验步骤:
将5-10μCi 18F标记化合物或1-2μCi 125I标记化合物(100μL生理盐水溶液,含10%乙醇)由尾静脉注射入正常小鼠(ICR,male,18-20g,3-4周龄)体内(n=3或5),分别于注射后2分钟、10分钟、30分钟和60分钟将其解剖取出相关脏器,测量湿重及放射性计数。数据表示为每克脏器中放射性百分剂量(%ID/g)。
二、实验结果:
实验结果如表2所示,本发明所述的探针[125I]1、[125I]2、[18F]4均可以顺利的通过血脑屏障,2分钟时脑部摄取达到峰值且在正常小鼠脑部清除很快。
表2:部分化合物在正常小鼠体内动物分布结果
实施例66:Tau活性测定
一、实验步骤:
(1)预处理AD人脑切片;
(2)在AD人脑切片上覆盖10μCi/mL的125I标记的化合物溶液1mL,其中加入稳定冷配体(终浓度为0.1nM,1nM,5nM,10nM,50nM,100nM和500nM),室温下孵育2小时;
(3)用50%乙醇溶液泡30分钟,或用50%乙醇溶液冲洗5分钟;
(4)晾干后,保鲜膜包覆置于磷屏下曝光24小时,用储磷屏系统分析图像,得到Region of interests(ROIs)的量化数值(Digital Light Unit/mm2,DLU/mm2),根据数值和对应的冷配体浓度拟合曲线,半抑制常数(IC50)通过拟合计算后得到。
二、实验结果:
实验结果表明,化合物1的IC50值为1.63nM,化合物4的IC50值为8.22nM,如表3所示,部分化合物的活性通过抑制实验评估(冷配体终浓度为10nM),表明本发明的探针,特别是化合物1和4,对Tau蛋白具有特别高的活性。
表3:部分化合物Tau活性评估
实施例67:Aβ活性测定
一、实验步骤
(1)将100μL放射性配体([125I]IMPY,100000CPM/100μL),100μL化合物1,4,12,19和20的乙醇溶液(10-4M至10-10M),700μL BSA(0.1% PBS溶液)和Aβ1-42聚集物(100μL,最终浓度0.7μM)依次顺序加入硼硅玻璃试管中。
(2)在37℃下,静置孵育2小时。
(3)用美国Brandel公司的MP-48T细胞收集器过滤分离,并用10%乙醇洗涤三次。
(4)收集含有与Aβ1-42聚集物结合的125I配体的玻璃纤维滤纸放置在已编号的计数管底部,并用美国Perkinelmer公司的Wizard2 2480γ计数器测量每个计数管的放射性计数。半抑制常数(IC50)通过拟合计算后得到,抑制常数(Ki)根据Cheng-Prusoff方程计算:Ki=IC50/(1+[L]/Kd)。
二、实验结果
实验结果如表4所示,化合物1,4,12,19和20对Aβ活性(Ki)基本在微摩量级,基本说明与Aβ的结合能力很差。
表4:部分化合物Aβ1-42活性测试结果
化合物 | Aβ活性(nM) |
1 | 985.07 |
4 | 441.19 |
12 | >1000 |
19 | >1000 |
20 | >1000 |
实施例68:MAO-A/B活性测定
一、实验步骤
(1)配制底物溶液,将10μL 4-(三氟甲基)苄胺溶于9990μL PBS(1X)中。
(2)配制显色液,将2.03mg 4-氨基安替比林,3.36mg香草酸,400μL辣根过氧化酶水溶液(2mg/mL)溶于19.6mLPBS中。
(3)配制抑制剂溶液,即将司来吉兰和氯极灵配制成1000nM的水溶液。
(4)在96孔板中,加入50μL提取的酶液和50μL抑制溶液,37℃孵育30分钟,孵育完毕后加入50μL不同浓度的待测样品,37℃再孵育30分钟,孵育完毕后,依次加入100μL底物和40μL显色液,37℃下孵育90分钟。
(5)孵育完毕后,用酶标仪在490nm处测定紫外吸光度,横坐标为待测样品的最终浓度的负对数值,纵坐标为吸光度,用one-site模式计算得出IC50值。
二、实验结果
实验结果表明,化合物1,2,3,8,44,53,54和60的IC50值均大于1000nM,说明它们与MAO-A/B无活性,预测在脑内不存在相应的非靶摄取。
虽然,上文中已经用一般性说明及具体实施方案对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。以上所述,仅为本发明的较佳实施例而已,故不能依此限定本发明实施的范围,即依本发明专利范围及说明书内容所作的等效变化与修饰,皆应仍属本发明涵盖的范围内。
Claims (6)
1.一种咪唑并萘啶类化合物,其特征在于,选自如下化合物:
其中,化合物1-4、化合物14-17、化合物19中I为123I,125I或127I;
化合物5-13、化合物18中F为18F或19F。
2.权利要求1所述咪唑并萘啶类化合物的制备方法,其特征在于,当I为123I或125I,化合物1-4、化合物14-17、化合物19由三正丁基锡或硼酸酯前体化合物与[123/125I]NaI溶液在氧化剂存在下反应得到;
当F为18F,化合物5-13、化合物18由OTs、三甲基季铵盐或硼酸酯前体化合物与[18F]F阴离子在相转移催化剂存在下反应得到。
3.权利要求1所述咪唑并萘啶类化合物的衍生物,其特征在于,所述衍生物为所述咪唑并萘啶类化合物的药用可接受的盐。
4.一种由Tau蛋白沉积引起的神经纤维缠结疾病的诊断或检测试剂,其特征在于,其有效成分为权利要求1所述咪唑并萘啶类化合物和/或权利要求3所述的衍生物。
5.根据权利要求4所述的诊断或检测试剂,其特征在于,所述疾病包括阿尔茨海默病、额颞叶退行性病变、慢性创伤性脑病、进行性核上性麻痹、皮质基底节退行性变或皮克氏病。
6.权利要求1所述咪唑并萘啶类化合物或权利要求3所述的衍生物在制备核医学显像剂中的应用;所述化合物或衍生物中I为125I或123I,F为18F。
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