CN106905256A - 苯并五元杂环类ido1抑制剂、其制备方法及应用 - Google Patents
苯并五元杂环类ido1抑制剂、其制备方法及应用 Download PDFInfo
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
- C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
- C07D263/58—Benzoxazoles; Hydrogenated benzoxazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
本发明属于药物领域,具体涉及一种具有式(I)结构特征的苯并五元杂环类化合物或其药学上可接受的盐、其制备方法、以及它们作为吲哚胺2,3‑双加氧酶1(IDO1)抑制剂的用途。实验结果表明,本发明的化合物对IDO1的活性具有显著抑制作用,能够有效地促进T细胞增殖,抑制初始T细胞分化成调节性T细胞,逆转IDO1介导的免疫抑制,可以用于治疗具有IDO1介导的犬尿氨酸代谢途径的病理学特征的相关疾病,包括癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症和自身免疫性疾病等。
Description
技术领域
本发明属于药物领域,具体涉及一种苯并五元杂环类化合物或其药学上可接受的盐、其制备方法、以及它们作为吲哚胺2,3-双加氧酶1(IDO1)抑制剂的用途。
技术背景
色氨酸是人体细胞维持增殖和存活所必需的氨基酸,可用于蛋白质、烟酸和5-羟色胺的生物合成。色氨酸一般从食物中摄取,超过95%色氨酸沿犬尿酸途径代谢,余下的色氨酸在神经系统和肠道中转化5-羟色氨酸和5-羟色胺,或在松果体中合成褪黑素。吲哚胺2,3-双加氧酶1(indoleamine 2,3-dioxygenase,IDO1)是人体肝脏外催化色氨酸沿犬尿氨酸途径代谢的限速酶。IDO1在多种组织(如肺、肾、脑、胎盘、胸腺)以及多种细胞(如巨噬细胞和树突状细胞)中表达。IDO1通过氧化裂解色氨酸降低机体微环境中色氨酸的浓度,并且产生犬尿氨酸、3-羟基犬尿氨酸、2-氨基-3-羟基苯甲酸、喹啉酸等一系列代谢产物。细胞因子如IFN-γ、TNF-α、IL-1β和IL-6可诱导IDO1上调表达(Bernhardt R.Chem Rev,1996,96(1):2841-2888)。
大量的证据表明,IDO1不仅可以催化色氨酸氧化代谢,而且还对机体的固有免疫和适应性免疫具有重要的调节作用(Munn DH,et al.Trends Immunol,2013,34(3):137-143)。IDO1主要是通过催化色氨酸代谢导致色氨酸耗竭及其代谢产物聚积来实现其对免疫系统的调控作用:一方面,色氨酸耗竭可通过激活GCN2通路诱导T细胞分裂周期滞留于G1期,从而抑制T细胞的增殖,同时还抑制初始CD4+T细胞分化成辅助性T细胞17(Th17),进而产生免疫抑制(Munn DH,et al.Immunity,2005,22(5):633-642)。另一方面,犬尿氨酸等色氨酸代谢产物具有细胞毒性,可以杀灭T细胞和自然杀伤(NK)细胞(Frumento G,et al.JExp Med,2002,196(4):459-468;Munn DH,et al.J Clin Invest,2004,114(2):280-290),而且这些代谢产物还可以通过激活芳香烃受体(AHR)来诱导CD4+T细胞分化成调节性T(Treg)细胞,并促进树突状细胞(DC)转化成致耐受性DC(Mezrich JD,et al.J Immunol,2010,185(6):3190-3198;Mezrich JD,et al.J Immunol,2008,181(8):5396-5404);此外,色氨酸代谢产物可通过下调NK细胞受体的表达来抑制NK细胞的功能,这些都可以进一步抑制机体的免疫反应(Della Chiesa M,et al.Blood,2006,108(13):4118-4125)。
IDO1与很多生理病理过程有关。研究表明,IDO1在宿主免疫防御和母胎免疫耐受等生理过程中发挥重要的免疫调节作用。机体在正常状态下,IDO1表达水平较低,但在胎盘发育和炎症反应等生理性应激中,细胞因子如IFN-γ分泌显著增加,从而诱导IDO1表达上调,导致色氨酸耗竭和犬尿氨酸等代谢产物聚积,从而抑制母体的T细胞反应,诱导母胎免疫耐受,确保胎儿不被母体的免疫系统排斥;宿主微环境中的色氨酸耗竭使其不能为病原微生物复制提供所必需的色氨酸,从而导致病原微生物死亡;与此同时IDO1介导的免疫抑制可以避免机体免疫系统的过度激活(Mellor AL,et al.Nat Rev Immunol,2008,8(1):74-80;Terness P,et al.Am J Reprod Immunol,2007,58(3):238-254;Divanovic S,etal.J Infect Dis,2012,205(1):152-161)。当给妊娠小鼠施用IDO1抑制剂后,会引起T细胞介导的胚胎排斥反应,导致小鼠流产,表明IDO1可以使胎儿免于母体的排斥(Munn DH,etal.Science,1998,281(5380):1191-1193)。IDO1对移植组织在新宿主中的存活也发挥免疫抑制作用(Radu CA,et al.Plast Reconstr Surg,2007,119(7):2023-2028)。这些研究结果说明IDO是一种免疫调节酶,参与机体的免疫耐受。
众多研究表明,IDO1介导的免疫耐受与肿瘤免疫逃逸、病毒感染、神经变性疾病、器官移植排斥、自身免疫性疾病、神经精神疾病和白内障等疾病的密切相关(Munn DH,etal.Trends Immunol,2013,34(3):137-143;Nguyen NT,et al.Front Immunol,2014,5:551;Myint AM,et al.J Affect Disord,2007,98(1-2):143-151;Mailankot M,et al.LabInvest,2009,89(5):498-512)。在这些疾病中,过度表达的IDO1所介导的色氨酸耗竭及其代谢产物的聚积可以抑制T细胞的激活,导致机体的免疫耐受。
在病毒感染的小鼠模型中,给予IDO1抑制剂可明显促进CD8+T细胞的增殖,恢复T细胞的免疫应答,抑制病毒感染宿主的单核巨噬细胞。在流感病毒感染时,过度表达的IDO1介导的免疫抑制作用易导致肺部发生二次感染(van der Sluijs KF,et al.J InfectDis,2006,193(2):214-222)。在HIV感染时,IDO1会被上调表达,促进Treg细胞的增殖,而抑制Th17细胞的增殖,造成Tregs/Th17细胞比例失调,导致患者的免疫抑制(Favre D,etal.Sci Transl Med,2010,2(32):32ra36)。此外,IDO1介导的色氨酸耗竭及其代谢产物浓度升高还与寄生虫感染有关(Knubel CP,et al.FASEB J,2010,24(8):2689-2701)。
研究表明,IDO1催化的色氨酸代谢产物如犬尿氨酸和喹啉酸等具有神经毒性,并且这些代谢产物与神经变性疾病如记忆障碍症、阿尔茨海默病(AD)、认知障碍症、老年痴呆症、帕金森病、帕金森综合症和运动障碍性疾病的发生密切相关(Malpass K.Nat RevNeurol,2011,7(8):417;Maddison DC,et al.Semin Cell Dev Biol,2015,40:134-141)。在AD患者大脑中IDO1表达和喹啉酸浓度均高于正常人,其中在老年斑周围的小胶质细胞和星形细胞中含量最高。此外,在AD患者血液中的色氨酸浓度低于正常人,而犬尿氨酸浓度则高于正常人,而且两者的比例高低与患者的认识缺陷程度密切相关(Guillemin GJ,etal.Neuropathol Appl Neurobiol,2005,31(4):395-404;Widner B,et al.Adv Exp MedBiol,1999,467:133-138)。神经精神疾病如抑郁症、精神分裂症、焦虑症也与IDO1过度表达和犬尿氨酸等代谢产物水平升高有关。IDO1的过度表达造成色氨酸耗竭,从而减少用于合成神经递质5-羟色胺的色氨酸的量,导致5-羟色胺缺乏,再加上具有神经毒性的犬尿氨酸和喹啉酸等代谢产物的聚积,共同促进神经精神疾病的发生,而且是多种心境障碍的因素(Myint AM.FEBS J,2012,279(8):1375-1385)。因此,抑制IDO1是神经变性疾病和神经精神疾病患者的重要治疗策略。
IDO1高表达所介导的色氨酸过度代谢也存在于各种自身免疫性疾病中(NguyenNT,et al.Front Immunol,2014,5:551)。在类风湿关节炎患者滑膜关节组织的DCs高表达IDO1,患者血清中色氨酸浓度降低,而犬尿氨酸浓度升高(Zhu L,et al.J Immunol,2006,177(11):8226-8233;Ozkan Y.et al.Clin Rheumatol,2012,31(1):29-34)。在系统性红斑狼疮患者中也存在IDO1过度表达和色氨酸代谢增强的现象。患者血清中的色氨酸浓度降低,代谢产物犬尿酸浓度和犬尿氨酸和色氨酸比值均明显升高(Widner B,etal.Immunobiology,2000,201(5):621-630)。因此,抑制IDO1也是自身免疫性疾病患者重要的治疗策略。
大量的研究表明,IDO1诱导的免疫抑制在肿瘤免疫逃逸中起重要的作用。IDO1过度表达于各类肿瘤细胞及其微环境中的细胞如DC和基质细胞,导致肿瘤局部色氨酸耗竭和色氨酸代谢产物聚积,从而诱导肿瘤免疫逃逸,帮助肿瘤细胞逃避机体免疫系统的攻击(Munn DH,et al.Trends Immunol,2016,37(3):193-207)。Uyttenhove小组利用免疫组织化学标记方法在黑色素瘤、肺癌、乳腺癌、胃癌、结肠癌、膀胱癌、胰腺癌、淋巴癌、前列腺癌、肾癌、脑癌、头颈癌、卵巢癌、宫颈癌、子宫内膜癌、间皮瘤、甲状腺癌、食管癌和肝癌等24种人类肿瘤细胞中检测到了IDO1的表达(Uyttenhove C,et al.Nat Med,2003,9(10):1269-1274)。随后在卵巢癌、黑色素瘤、肺癌、白血病等肿瘤组织中进一步得到证实,并且发现肿瘤组织内IDO1的表达量与肿瘤的恶性程度关系密切,并且影响肿瘤患者的预后(Théate I,et al.Cancer Immunol Res,2015,3(2):161-172;Curti A,et al.Blood,2007,109(7):2871-2877;de Jong RA,et al.Int J Gynecol Cancer,2011,21(7):1320-1327;OkamotoA,et al.Clin Cancer Res,2005,11(16):6030-6039;Ino K,et al.Br J Cancer,2006,95(11):1555-1561;Speeckaert R,et al.Eur.J.Cancer,2012,48(13):2004-2011)。IDO1抑制剂可以激活T细胞,克服由IDO1介导的肿瘤免疫逃逸,而且还可以提高其它肿瘤治疗剂的疗法(Koblish HK,et al.Mol Cancer Ther,2010,9(2):489-498;Wainwright DA,etal.Clin Cancer Res,2014,20(20):5290-5301)。
多项临床前和临床研究表明,IDO1抑制剂可以降低色氨酸代谢和犬尿氨酸等代谢产物的聚积,从而逆转IDO1介导的免疫抑制,恢复T细胞和NK细胞的增殖和功能,抑制Treg细胞的增殖,从而增强机体的免疫应答,因此IDO1抑制剂可用于治疗由IDO1介导的免疫抑制所引起的上述相关疾病,包括癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症和自身免疫性疾病。此外,IDO1抑制剂还可以和其它化疗剂、靶向抗肿瘤药物、免疫检查点治疗剂、抗肿瘤疫苗、抗病毒剂、抗病毒疫苗、细胞因子疗法、过继性细胞免疫治疗和放射治疗联合作用,起到协同或增强疗法的作用(Vacchelli E,et al.Oncoimmunology,2014,3(10):e957994;Jochems C,et al.Oncotarget,2016,7(25):37762-37772;Liu X,etal.Blood,2010,115(17):3520-3530;Zamarin D,et al.Pharmacol Ther,2015,150:23-32)。
目前正在开发IDO1小分子抑制剂用来治疗或预防上述与IDO1相关的疾病。例如,在CN102164902B中报道了噁二唑类IDO1抑制剂,涉及通过施用IDO1抑制剂或与其它治疗剂联合使用来治疗癌症、病毒感染、神经变性疾病、创伤、年龄相关的白内障、器官移植排斥或自身免疫性疾病患者。
基于IDO1与癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、自身免疫性疾病和抑郁症等多种疾病的发病机制密切相关,因此可以采用IDO1抑制剂来抑制IDO1的活性,从而降低色氨酸代谢以及犬尿氨酸等代谢产物的聚积,恢复机体的免疫功能,进而达到治疗上述疾病的目的。本发明所述的化合物具有IDO1抑制活性,可以用于治疗IDO1介导的免疫抑制所引起的相关疾病,包括癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、自身免疫性疾病和抑郁症。
发明内容
本发明所要解决的技术问题在于提供了一种苯并五元杂环类化合物或其药学上可接受的盐、其制备方法、药物组合物及应用。本发明的化合物具有良好的IDO1抑制活性,可以用于治疗和/或预防IDO1介导的免疫抑制所引起的各种相关疾病。
本发明提供了通式(I)所示的苯并五元杂环化合物或其药学上可接受的盐:
其中:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表C、O、S、NH或N;
B代表O、S或NH2;
R1代表氢、卤素、硝基、羟基、氰基、氨基或C1-C10烷基;
R2代表氢、C1-C4烷基、C1-C10烷基C(O)R3、-C(O)NR4R5、-C(O)R3、C6-C10芳基、(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或-(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基、甲氧基或R3;
R3、R4、R5可以相同或不同,代表氢、C1-C8烷基、C3-C6环烷基、C6-C10芳基、-(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基或甲氧基。
进一步地,具有通式(I)所示的苯并五元杂环类化合物或其药学上可接受的盐,其特征在于:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表O、NH或N;
B代表O或NH2;
R1代表氢、卤素、硝基、羟基或氨基;
R2代表氢、C1-C4烷基、C1-C10烷基C(O)R3、-C(O)NR4R5、-C(O)R3、C6-C10芳基、-(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或-(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基、甲氧基或R3;
R3、R4、R5可以相同或不同,代表氢、C1-C8烷基、C3-C6环烷基、C6-C10芳基、(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基或甲氧基。
进一步地,具有通式(I)所示的苯并五元杂环类化合物或其药学上可接受的盐,其特征在于:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表O、NH或N;
B代表O或NH2;
R1代表氢、氯、氟、硝基或氨基;
R2任选自:
具体来说,通式(I)所示的苯并五元杂环类化合物优选自下列化合物:
下面药理实验中涉及的化合物代号等同于此处代号所对应的化合物。
本发明还提供了通式(I)所示化合物的制备方法,其特征在于:
a)当A为O,B为O时,通式(I)所示化合物的制备方法为:不同取代的邻氨基苯酚与CDI发生缩合反应制得中间体1,1与不同取代的α-氯代苯乙酮反应制得2a-f,2a-f经硼氢化钠还原制得3a-f;1与不同取代的芳烷基氯反应制得4a-j,4i被还原制得5;1与不同的酰氯反应制得6a-c;1与不同胺类化合物反应制得7a-c;其合成路线如下:
其中,R1和R2的定义如前所述;
b)当A为NH,B为O时,通式(I)所示化合物的制备方法为:2-苯并咪唑酮与α-氯代-4′-氟苯乙酮反应制得8,8经硼氢化钠还原制得9;其合成路线如下:
其中,R1和R2的定义如前所述;
c)当A为N,B为NH2时,通式(I)所示化合物的制备方法为:1H-2-氨基苯并咪唑经Boc保护制得10,10与酰氯反应制得11,11脱去Boc取代基制得12;其合成路线如下:
其中,R1和R2的定义如前所述。
所述通式(I)化合物的药学上可接受的盐可通过一般的化学方法合成。
一般情况下,盐的制备可以通过游离碱或酸与等化学当量或过量酸(无机酸或有机酸)或碱(无机碱或有机碱)在合适的溶剂或溶剂组合物中反应制得。
本发明还提供了一种药物组合物,其由治疗上有效量的活性组分和药学上可接受的辅料组成;所述的活性组分包括通式(I)化合物和其药学上可接受的盐中的一种或多种。所述药物组合物中,所述的辅料包括药学上可接受的载体、稀释剂和/或赋形剂。
根据治疗目的可将药物组合物制成各种类型的给药单位剂型,如片剂、丸剂、粉剂、液体、悬浮液、乳液、颗粒剂、胶囊、栓剂和针剂(溶液和悬浮液)等,优选片剂、胶囊、液体、悬浮液、和针剂(溶液和悬浮液)。
为了使片剂、丸剂或栓剂形式的药物组合物成形,可使用本领域任何已知并广泛使用的赋形剂。
为了制备针剂形式的药物组合物,可将溶液或悬浮液消毒后(最好加入适量的氯化钠,葡萄糖或甘油),制成与血液等渗压的针剂。在制备针剂时,也可以使用本领域内任何常用的载体。例如:水、乙醇、丙二醇、乙氧基化的异硬脂醇、聚氧基化的异硬脂醇和聚乙烯脱水山梨醇的脂肪酸酯等。此外,还可以加入通常溶解剂和缓冲剂等。
本发明所述的组合物在药物组合物中的含量无特殊限制,可在很宽的范围内进行选择,通常可为质量百分比的5~95%,优先为质量百分比的30~85%。
本发明所述的药物组合物的给药方法没有特殊限制。可根据患者年龄、性别和其它条件及症状,选择各种剂型的制剂给药。
本发明另外提供了所述通式(I)化合物、其药学上可接受的盐或所述药物组合物在制备吲哚胺2,3-双加氧酶1(IDO1)抑制剂中的应用。所述的IDO1抑制剂用于治疗IDO1介导的免疫抑制的相关疾病患者,所述的相关疾病包括癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症和自身免疫性疾病。
本发明还提供了所述通式(I)化合物、其药学上可接受的盐或所述药物组合物在制备药物中的用途,所述药物用于治疗患者的癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症或自身免疫性疾病。
所述的癌症包括但不限于:恶性黑色素瘤、肺癌、乳腺癌、胃癌、结肠癌、膀胱癌、胰腺癌、淋巴癌、白血病、前列腺癌、睾丸癌、肾癌、脑癌、头颈癌、卵巢癌、宫颈癌、子宫内膜癌、间皮瘤、甲状腺癌、肝癌和食管癌中的一种或多种。
所述的病毒感染包括但不限于:由人类免疫缺陷病毒、乙型肝炎病毒、丙型肝炎病毒、流感病毒、脊髓灰质炎病毒、巨细胞病毒、柯萨奇病毒、人类乳头状瘤病毒、爱泼斯坦-巴尔病毒和水痘-带状疱疹病毒中的一种或多种引起的感染。
所述的神经变性疾病包括但不限于:记忆障碍症、阿尔茨海默病、认知障碍症、老年痴呆症、帕金森病、帕金森综合症和运动障碍性疾病中的一种或多种。
所述的自身免疫性疾病包括但不限于:类风湿性关节炎、系统性红斑狼疮、皮肌炎、硬皮病、结节性脉管炎、多发性硬化症、肾病、重症肌无力、混合性结缔组织病、银屑病、肝病、内分泌相关疾病和由于感染引起的自身免疫反应中的一种或多种。
本发明还提供了所述通式(I)化合物、其药学上可接受的盐或所述药物组合物可以和一种或多种其它种类的治疗剂和/或治疗方法联合用于治疗由IDO1介导的相关疾病。
所述其它种类的治疗剂和/或治疗方法包括但不限于:化疗剂、靶向抗肿瘤药物、免疫检查点共抑制分子的抑制剂、免疫检查点共刺激分子的激动剂、抗肿瘤疫苗、抗病毒剂、抗病毒疫苗、细胞因子疗法、过继性细胞免疫治疗或放射治疗。
所述的化疗剂包括但不限于:烷化剂、微管蛋白抑制剂、拓扑酶抑制剂、铂类药物、抗代谢类药物或激素类抗肿瘤药物。
所述的靶向抗肿瘤药物包括但不限于:蛋白激酶抑制剂、蛋白酶体抑制剂、异柠檬酸脱氢酶抑制剂、基于表观遗传学的抗肿瘤药物或细胞周期信号通路抑制剂。
所述的免疫检查点抑制剂包括但不限于:CTLA-4抑制剂、PD-1抑制剂、PD-L1抑制剂、PD-L2抑制剂、TIM-3抑制剂、VISTA抑制剂、LAG3抑制剂、TIGIT抑制剂、A2AR抑制剂或VTCN1抑制剂。
所述的免疫检查点激动剂包括但不限于:STING激动剂、4-1BB激动剂、OX40激动剂、RORγ激动剂或ICOS激动剂。
具体实施方式
为了进一步阐明本发明,下面给出一系列实施例,这些实施例完全是例证性的,它们仅用来对本发明具体描述,不应当理解为对本发明的限制。
实施例1
2-苯并恶唑啉酮(1a)的合成
将邻氨基苯酚(1.00g,9.16mmol)和CDI(1.78g,10.99mmol)用30mL无水DMF溶解,氮气保护,80℃下反应5h,降至室温,加水(10mL)淬灭反应,乙酸乙酯(3×7mL)萃取,分别用饱和氯化铵和饱和食盐水洗涤有机层,无水硫酸镁干燥,柱层析分离(石油醚∶乙酸乙酯=7∶1),得淡红色固体1.10g,收率89%,mp 137-141℃。1H NMR(300MHz,Chloroform-d)δ9.81(s,1H),8.00-6.85(m,4H).
3-(4-氟苯乙酮基)-2-苯并恶唑啉酮(2a)的合成
将2-苯并恶唑啉酮(0.10g,0.74mmol)和碳酸钾(0.31g,2.22mmol)用10mL DMF混合,80℃下反应1h,随后将温度降至60℃,加入α-氯代-4′-氟苯乙酮(0.38g,2.22mmol),反应3h,降至室温,加入饱和氯化铵溶液(10mL)淬灭反应,乙酸乙酯萃取(3×7mL),饱和食盐水洗涤,无水硫酸镁干燥,柱层析分离(石油醚∶乙酸乙酯=10∶1),得淡黄色固体0.17g,收率83%,mp 148-150℃。ESI-MS:294.1[M+Na]+;1H NMR(300MHz,Chloroform-d)δ8.08(ddd,J=9.0,5.2,2.1Hz,2H),7.39-6.96(m,5H),6.85(dq,J=4.8,3.3,2.1Hz,1H),5.22(d,J=2.0Hz,2H).IR(KBr):3074,1763,1694,1601,1487,1232cm-1.
实施例2
3-(4-氯苯乙酮基)-2-苯并恶唑啉酮(2b)的合成
参照目标化合物2a的合成方法,以2-苯并恶唑啉酮与α-氯代-4′-氯苯乙酮为原料制得,收率85%,mp 193-195℃。ESI-MS:288.6[M+H]+;1H NMR(300MHz,Chloroform-d)δ8.14-7.86(m,2H),7.53(d,J=8.0Hz,2H),7.40-7.05(m,3H),6.86(s,1H),5.23(d,J=3.1Hz,2H).IR(KBr):3065,1763,1691,1587,1487,1246cm-1.
实施例3
3-(3-氯苯乙酮基)-2-苯并恶唑啉酮(2c)的合成
参照目标化合物2a的合成方法,以2-苯并恶唑啉酮与α-氯代-3′-氯苯乙酮为原料制得,收率85%,mp 150-152℃。ESI-MS:288.6[M+H]+;1H NMR(300MHz,Chloroform-d)δ8.34-7.84(m,2H),7.83-7.43(m,2H),7.42-7.07(m,3H),7.02-6.76(m,1H),5.23(qd,J=8.4,4.9,4.3Hz,2H).IR(KBr):3071,1722,1683,1601,1512,1229cm-1.
实施例4
5-氯-2-苯并恶唑啉酮(1b)的合成
参照1a的合成方法,以4-氯-2-氨基苯酚为原料制得,收率87%,mp 189-193℃。1HNMR(300MHz,Chloroform-d)δ8.87(s,1H),7.28(d,J=1.8Hz,1H),7.13(dp,J=8.0,2.1Hz,2H).
5-氯-3-(4-氟苯乙酮基)-2-苯并恶唑啉酮(2d)的合成
参照目标化合物2a的合成方法,以1b与α-氯代-4′-氟苯乙酮为原料制得,收率89%,mp 153-155℃。ESI-MS:306.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ8.08(d,J=7.4Hz,2H),7.20(dd,J=30.4,9.8Hz,4H),6.85(s,1H),5.20(s,2H).IR(KBr):3076,1771,1690,1599,1487,1232cm-1.
实施例5
5-氯-3-(4-氯苯乙酮基)-2-苯并恶唑啉酮(2e)的合成
参照目标化合物2a的合成方法,以1b与α-氯代-4′-氯苯乙酮为原料制得,收率87%,mp 167-169℃。ESI-MS:323.1[M+H]+;1H NMR(300MHz,Chloroform-d)δ8.05-7.93(m,2H),7.60-7.50(m,2H),7.24-7.12(m,2H),6.85(d,J=2.0Hz,1H),5.21(s,2H).IR(KBr):3067,1772,1719,1589,1485,1246cm-1.
实施例6
5-氯-3-(3-氯苯乙酮基)-2-苯并恶唑啉酮(2f)的合成
参照目标化合物2a的合成方法,以1b与α-氯代-3′-氯苯乙酮为原料制得,收率87%,mp 134-136℃。ESI-MS:323.1[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.97(d,J=27.1Hz,2H),7.68(s,1H),7.54(s,1H),7.17(d,J=10.9Hz,2H),6.84(s,1H),5.22(s,2H).IR(KBr):3067,1778,1703,1614,1487,1223cm-1.
实施例7
3-(2-(4-氟苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3a)的合成
将目标化合物2a(0.10g,0.37mmol)用10mL无水四氢呋喃溶解,冰浴下加入硼氢化钠(0.04g,1.11mmol),冰浴下反应1h,加入10mL饱和氯化铵淬灭,乙酸乙酯萃取(3×7mL),无水硫酸镁干燥,柱层析纯化(石油醚∶乙酸乙酯=5∶1),得白色固体0.10g,收率99%,mp111-113℃。ESI-MS:274.3[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.89(s,1H),7.53-7.37(m,2H),7.26-6.86(m,5H),5.79(t,1H),4.41(t,1H),4.10(t,1H).IR(KBr):3645,3071,1722,1601,1512,1229,1103cm-1.
实施例8
3-(2-(4-氯苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3b)的合成
参照目标化合物3a合成方法,以2b为原料制得,收率99%,mp 140-142℃。ESI-MS:290.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.36(q,J=7.5,6.4Hz,4H),7.15(dq,J=14.1,6.9Hz,3H),6.99(d,J=7.0Hz,1H),5.14(s,1H),3.95(d,J=10.8Hz,2H),3.06(s,1H).IR(KBr):3645,3063,1748,1593,1485,1240,1090cm-1.
实施例9
3-(2-(3-氯苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3c)的合成
参照目标化合物3a合成方法,以2c为原料制得,收率99%,mp 113-115℃。ESI-MS:290.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.52-7.42(m,1H),7.28(d,J=2.2Hz,3H),7.20-7.05(m,3H),7.01(dd,J=7.9,1.7Hz,1H),5.11(dd,J=8.2,4.0Hz,1H),4.13-3.83(m,3H),3.54(s,1H).IR(KBr):3646,3063,1759,1599,1485,1240,1103cm-1.
实施例10
5-氯-3-(2-(4-氟苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3d)的合成
参照目标化合物3a合成方法,以2d为原料制得,收率99%,mp 142-144℃。ESI-MS:308.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.42(dd,J=8.4,5.3Hz,2H),7.18-6.87(m,5H),5.14(dd,J=8.4,3.7Hz,1H),4.17-3.79(m,2H),2.94(s,1H).IR(KBr):3646,3089,1771,1607,1485,1223,1096cm-1.
实施例11
5-氯-3-(2-(4-氯苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3e)的合成
参照目标化合物3a合成方法,以2e为原料制得,收率99%,mp 127-129℃。ESI-MS:325.1[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.42-7.32(m,4H),7.09(d,J=1.1Hz,1H),7.08(s,1H),7.03(dd,J=1.8,0.8Hz,1H),5.12(dd,J=8.3,3.6Hz,1H),3.99(dd,J=14.6,3.6Hz,1H),3.87(dd,J=14.5,8.3Hz,1H),2.97(s,1H).IR(KBr):3626,3063,1767,1614,1485,1252,1092cm-1.
实施例12
5-氯-3-(2-(3-氯苯基)-2-羟基)乙基-2-苯并恶唑啉酮(3f)的合成
参照目标化合物3a合成方法,以2f为原料制得,收率99%,mp 157-159℃。ESI-MS:325.1[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.45(dq,J=1.6,0.9Hz,1H),7.43-7.37(m,2H),7.37-7.31(m,1H),7.16-7.05(m,2H),6.95(d,J=8.5Hz,1H),5.74(t,J=8.3Hz,1H),4.38(t,J=8.9Hz,1H),4.01(dd,J=9.1,7.9Hz,1H).IR(KBr):3647,3078,1728,1599,1506,1261,1099cm-1.
实施例13
3-苯乙基-2-苯并恶唑啉酮(4a)的合成
将2-苯并恶唑啉酮(0.10g,0.74mmol)和碳酸钾(0.31g,2.22mmol)用10mL DMF混合,80℃下反应1h,随后将温度降至60℃,加入β-溴代苯乙烷(0.41g,2.22mmol),反应6h,降至室温,加入10mL饱和氯化铵溶液淬灭反应,乙酸乙酯萃取(3×7mL),饱和食盐水洗有机层,无水硫酸镁干燥,柱层析(石油醚∶乙酸乙酯=10∶1),得白色固体0.15g,收率86%,mp116-118℃。ESI-MS:240.3[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.29(d,J=7.7Hz,3H),7.20(s,3H),7.10(t,J=5.9Hz,2H),6.79(d,J=7.1Hz,1H),4.06(t,J=7.4Hz,2H),3.08(t,J=7.2Hz,2H).IR(KBr):3061,1767,1614,1489,1258cm-1.
实施例14
3-(3-氟苄基)-2-苯并恶唑啉酮(4b)的合成
参照目标化合物4a合成方法,以1a和3-氟氯苄制得,收率88%,mp 119-121℃。ESI-MS:244.2[M+H]+;1H NMR(300MHz,DMSO-d6)δ7.48-7.31(m,2H),7.30-6.86(m,6H),5.12-4.86(m,2H).IR(KBr):3042,1757,1589,1487,1252cm-1.
实施例15
3-(4-氯苄基)-2-苯并恶唑啉酮(4c)的合成
参照目标化合物4a合成方法,以1a和4-氯氯苄制得,收率87%,mp 145-147℃。ESI-MS:260.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.57-7.25(m,4H),7.23(s,1H),7.18-7.01(m,2H),6.95-6.74(m,1H),5.26-4.79(m,2H).IR(KBr):3005,1771,1597,1485,1275cm-1.
实施例16
5-氯-3-苯乙基-2-苯并恶唑啉酮(4d)的合成
参照目标化合物4a合成方法,以1b和β-溴代苯乙烷制得,收率88%,mp 102-104℃。ESI-MS:274.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.36-7.24(m,3H),7.24-7.15(m,2H),7.14-6.99(m,2H),6.67(d,J=2.0Hz,1H),4.03(t,J=7.3Hz,2H),3.06(t,J=7.3Hz,2H).IR(KBr):3057,1759,1610,1485,1246cm-1.
实施例17
5-氯-3-(3-氟苄基)-2-苯并恶唑啉酮(4e)的合成
参照目标化合物4a合成方法,以1b和3-氟氯苄制得,收率92%,mp 134-136℃。ESI-MS:278.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.36(q,J=11.9,9.7Hz,1H),7.22-6.92(m,5H),6.81(d,J=14.5Hz,1H),4.96(d,J=9.4Hz,2H).IR(KBr):3065,1772,1589,1506,1256cm-1.
实施例18
5-氯-3-(4-氯苄基)-2-苯并恶唑啉酮(4f)的合成
参照目标化合物4a合成方法,以1b和4-氯氯苄制得,收率91%,mp 122-124℃。ESI-MS:295.1[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.32(q,J=8.1Hz,4H),7.23-6.97(m,3H),6.90-6.73(m,1H),4.95(s,2H).IR(KBr):3067,1767,1601,1483,1252cm-1.
实施例19
5-氟-2-苯并恶唑啉酮(1c)的合成
参照1a的合成方法,由4-氟-2-氨基苯酚为原料制得,收率90%,mp 174-176℃。1HNMR(300MHz,Chloroform-d)δ9.60(s,1H),7.13(dd,J=8.7,4.2Hz,1H),6.93-6.68(m,2H).
5-氟-3-(3-氟苄基)-2-苯并恶唑啉酮(4g)的合成
参照目标化合物4a合成方法,以1c与3-氟氯苄制得,收率88%,mp 156-158℃。1HNMR(300MHz,Chloroform-d)δ(ppm)7.37(td,J=8.3,5.6Hz,1H),7.23-7.11(m,2H),7.06(dd,J=10.2,4.0Hz,2H),6.83(td,J=9.2,2.6Hz,1H),6.59(dd,J=7.7,2.6Hz,1H),5.00(s,2H).MS(EI)m/z 262.1[M+H]+.IR(KBr):3063,1765,1591,1487,1250cm-1.
实施例20
5-氟-3-(4-氯苄基)-2-苯并恶唑啉酮(4h)的合成
参照目标化合物4a合成方法,以1c与4-氯氯苄制得,收率82%,mp 103-105℃。1HNMR(300MHz,Chloroform-d)δ(ppm)7.46-7.21(m,4H),7.13(dd,J=8.8,4.2Hz,1H),6.79(td,J=9.2,2.6Hz,1H),6.57(dd,J=7.6,2.6Hz,1H),4.94(s,2H).MS(EI)m/z 278.2[M+H]+.IR(KBr):3061,1778,1614,1489,1250cm-1.
实施例21
5-硝基-3-(3-氟苄基)-2-苯并恶唑啉酮(4i)的合成
参照目标化合物4a合成方法,以5-硝基-2-苯并恶唑啉酮与3-氟氯苄制得,收率81%,mp 116-118℃。1H NMR(300MHz,Chloroform-d)δ(ppm)8.42(d,J=1.8Hz,1H),8.10(dd,J=7.5,2.0Hz,1H),7.40(d,J=7.5Hz,1H),7.35-7.25(m,2H),7.19(dt,J=8.7,1.8Hz,1H),6.97(ddt,J=8.9,6.8,2.3Hz,1H),5.56(d,J=1.3Hz,2H).MS(EI)m/z 289.1[M+H]+.IR(KBr):3065,1792,1614,1506,1261cm-1.
实施例22
5-硝基-3-(4-氯苄基)-2-苯并恶唑啉酮(4j)的合成
参照目标化合物4a合成方法,以5-硝基-2-苯并恶唑啉酮与4-氯氯苄制得,收率77%,mp 165-167℃。1H NMR(300MHz,Chloroform-d)δ(ppm)8.14(dd,J=8.8,2.3Hz,1H),7.76(d,J=2.3Hz,1H),7.48-7.29(m,5H),5.05(s,2H).MS(EI)m/z 303.1[M-H]+.IR(KBr):3080,1784,1595,1522,1260cm-1.
实施例23
5-氨基-3-(3-氟苄基)-2-苯并恶唑啉酮(5)的合成
将4i(0.10g,0.35mmol)用10mL工业乙醇溶解,氯化铵(0.19g,3.47mmol)溶解于2mL水加入反应体系。冰浴冷却下缓慢加入锌粉(0.23g,3.47mmol),冰浴反应1h恢复至室温反应2h,除去乙醇,乙酸乙酯萃取,无水硫酸镁干燥,柱层析分离(石油醚∶乙酸乙酯=5∶1),得淡黄色固体0.70g,收率78%,mp 179-181℃。1H NMR(300MHz,Chloroform-d)δ(ppm)7.29(d,J=21.3Hz,2H),7.10(d,J=7.7Hz,1H),7.03-6.96(m,2H),6.37(dd,J=8.5,2.4Hz,1H),6.15(d,J=2.2Hz,1H),4.92(s,2H),3.59(s,2H).MS(EI)m/z 257.1[M-H]+.IR(KBr):3356,3048,1746,1591,1489,1254cm-1.
实施例24
3-(2-(4-氟苯基)乙酰基)-2-苯并恶唑啉酮(6a)的合成
将1a(0.10g,0.74mmol)用10mL无水四氢呋喃溶解,加入三乙胺(0.22g,2.22mmol)缚酸,冰浴下滴加对氟苯乙酰氯的无水四氢呋喃溶液(0.15g,0.89mmol),滴毕将反应液温度升至室温,再加热至70℃,反应6h,加10mL水淬灭反应,乙酸乙酯萃取(3×7mL)。柱层析纯化(石油醚∶乙酸乙酯=10∶1),得白色固体0.17g,收率86%,mp 180-182℃。ESI-MS:272.2[M+H]+;1H NMR(300MHz,DMSO-d6)δ7.98-7.89(m,1H),7.50-7.41(m,1H),7.41-7.28(m,4H),7.24-7.14(m,2H),4.41(s,2H).IR(KBr):3067,1796,1721,1601,1514,1248cm-1.
实施例25
3-苯甲酰基-2-苯并恶唑啉酮(6b)的合成
参照目标化合物6a的合成方法,以1a与苯甲酰氯为原料制得,收率89%,mp 185-187℃。ESI-MS:240.2[M+H]+;1H NMR(300MHz,DMSO-d6)δ7.95-7.85(m,2H),7.84-7.75(m,1H),7.67(t,J=7.4Hz,1H),7.53(t,J=7.6Hz,2H),7.49-7.42(m,1H),7.40-7.26(m,2H).IR(KBr):3069,1805,1697,1599,1481,1250cm-1.
实施例26
5-氯-3-(2-(4-氟苯基)乙酰基)-2-苯并恶唑啉酮(6c)的合成
参照目标化合物6a的合成方法,以1b与对氟苯乙酰氯为原料制得,收率87%,mp193-195℃。ESI-MS:306.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ7.99(d,J=8.2Hz,2H),7.56(d,J=8.0Hz,2H),7.35-6.99(m,2H),6.85(s,1H),3.51(s,2H).IR(KBr):3063,1755,1715,1611,1485,1246cm-1.
实施例27
3-(4-甲氧苄基)氨甲酰基-2-苯并恶唑啉酮(7a)的合成
将固体光气(0.22g,0.74mmol)用5mL无水二氯甲烷溶解,冰浴下滴加2-苯并恶唑啉酮(0.10g,0.74mmol)和三乙胺(0.30g,2.96mmol)的无水二氯甲烷溶液(5mL),滴毕立即氮气保护,室温下搅拌1h后,冰浴下滴加对甲氧基苄胺(0.15g,1.11mmol)和三乙胺(0.11g,1.11mmol)的无水二氯甲烷溶液(5mL),室温下反应3h,加10mL饱和氯化铵淬灭,二氯甲烷萃取(3×7mL),无水硫酸镁干燥,柱层析(石油醚∶乙酸乙酯=7∶1),得白色固体0.18g,收率83%,mp 82-84℃。ESI-MS:299.4[M+H]+;1H NMR(300MHz,DMSO-d6)δ8.56(s,1H),7.89(d,1H),7.43(s,1H),7.41-7.25(m,4H),6.90(d,2H),4.45(d,2H),3.73(s,3H).IR(KBr):3266,3009,2951,2870,1761,1722,1612,1514,1275,1260,1034cm-1.
实施例28
5-氯-3-(3-甲氧苄基)氨甲酰基-2-苯并恶唑啉酮(7b)的合成
参照目标化合物7a的合成方法,以1b与固体光气、邻甲氧基苄胺为原料制得,收率90%,mp 120-122℃。ESI-MS:333.7[M+H]+;1H NMR(300MHz,Chloroform-d)δ8.37(s,1H),8.15(d,1H),7.33-7.16(m,3H),6.97-6.84(m,3H),4,60(d,2H),3.83(s,3H).IR(KBr):3354,3048,1771,1724,1601,1477,1265,1252,1042cm-1.
实施例29
5-氯-3-(4-甲氧苯基)氨甲酰基-2-苯并恶唑啉酮(7c)的合成
参照目标化合物7a的合成方法,以1b与固体光气、对甲氧基苯胺为原料制得,收率86%,mp 162-164℃。ESI-MS:319.7[M+H]+;1H NMR(300MHz,DMSO-d6)δ9.85(s,1H),7.89(d,J=2.3Hz,1H),7.53(dd,J=8.8,2.4Hz,3H),7.41-7.28(m,2H),7.22-7.07(m,2H),7.03-6.79(m,3H),3.77(s,3H),3.35(s,1H).IR(KBr):3291,3036,2957,2866,1784,1734,1609,1477,1246,1182,1034cm-1.
实施例30
1-(2-(4-氟苯基)-2羰乙基)-1,3-二氢-2H-苯并[d]咪唑-2-酮(8)的合成
参照目标化合物2a合成方法,以2-苯并咪唑酮和α-氯代-4′-氟苯乙酮为原料制得,产率78%,mp 280-282℃.1H NMR(300MHz,Chloroform-d)δ(ppm)8.22-8.03(m,2H),7.43-7.31(dd,J=7.9,1.5Hz,1H),7.26-7.14(m,3H),7.12-7.06(td,J=7.6,1.5Hz,1H),7.05-6.97(td,J=7.6,1.5Hz,1H),5.61(s,2H).MS(EI)m/z 273.3[M+H]+.IR(KBr):3323,3018,1687,1520,1439cm-1.
1-(2-(4-氟苯基)-2-羟乙基)-1,3-二氢-2H-苯并[d]咪唑-2-酮(9)的合成
参照目标化合物3a合成方法,以8为原料制得产率73%,mp 276-278℃.1H NMR(300MHz,Chloroform-d)δ(ppm)7.49-7.43(m,2H),7.39-7.35(m,1H),7.13-7.07(m,3H),7.06-7.01(td,J=7.6,1.5Hz,1H),7.00-6.96(dd,J=7.8,1.5Hz,1H),5.25-5.17(d,J=6.4Hz,1H),5.14-5.07(m,1H),4.38-4.27(d,J=4.9Hz,2H).MS(EI)m/z 273.3[M+H]+.IR(KBr):3570,3343,3028,1670,1521,1449cm-1.
实施例31
叔丁基(1H-苯并[d]咪唑-2-基)氨基甲酸酯(10)的合成
1H-2-氨基苯并咪唑(2.00g,15.02mmol)的THF(30mL)溶液中加入Boc2O(3.61g,16.52mmol)和TEA(3.04g,30.04mmol),然后在60℃下搅拌3h,冷却至室温,除去溶剂.石油醚洗涤得到白色固体粗产物10(3g,85.62%),直接用于下一步反应。
叔丁基(1-(2-(4-氟苯基)乙酰基)-1H-苯并[d]咪唑-2-基)氨基甲酸酯(11)的合成
参照目标化合物6a合成方法,以10为原料制得,产率53%,mp 310-312℃.1H NMR(300MHz,Chloroform-d)δ(ppm)8.53(s,1H),7.92-7.80(m,1H),7.76-7.64(dd,J=7.7,1.4Hz,1H),7.41-7.21(m,4H),7.11-6.99(m,2H),4.04-3.88(t,J=1.0Hz,2H),1.46(s,9H).MS(EI)m/z 370.4[M+H]+.IR(KBr):3353,3038,1680,1531,1423,1370cm-1.
1-(2-氨基-1H-苯并[d]咪唑-1-基)-2-(4-氟苯基)乙烷(12)的合成
冰浴下向含有11(0.5g,1.35mmol)的二氧六环(5mL)溶液中缓慢滴加HCl溶液(4MHCl,6.8mL),室温搅拌2h,将白色固体过滤,二氧六环洗涤得到盐酸盐,解离后得到12(0.26g,71.33%),mp 237-239℃.1H NMR(300MHz,Chloroform-d)δ(ppm)7.84-7.69(m,2H),7.36-7.22(m,4H),7.14-7.02(m,2H),6.15-6.08(d,J=5.9Hz,1H),6.06-6.00(d,J=5.9Hz,1H),4.03-3.93(t,J=1.0Hz,2H).MS(EI)m/z 270.2[M+H]+.IR(KBr):3356,3148,3048,1646,1591,1419cm-1.
实施例32
1.基于Hela细胞的IDO1抑制活性测试
1.1实验材料和主要仪器
1.2实验方法
从ATCC购买的Hela细胞保存在最低基础培养基(2mM L-谷氨酰胺和调成含有1.5g/L碳酸氢钠、0.1mM非必需氨基酸、1mM丙铜酸钠和10%胎牛血清的Earle氏BSS)中。在37℃下将Hela细胞保存在提供5%CO2的控湿培养箱中。
按5×103/孔的密度将Hela细胞接种在96孔培养板中,并培养过夜。第二天,将IFN-γ(终浓度100ng/mL)和化合物的系列稀释液(总体积200μL培养基)加给细胞。温育24小时后将140μL上清液/孔移至新的96孔板中,加入10μL 6.1mol/L的三氯乙酸,在恒温烘箱中50℃温育30min以使产生的N-甲酰基犬尿氨酸水解为犬尿氨酸。然后以4000rpm将反应混合物离心10min以去除沉淀物。将100μL上清液/孔移至另一96孔板中,与等体积2%(w/v)对-二甲氨基苯甲醛的乙酸溶液混合。使用酶标仪在480nm处检测吸光值,所得结果利用IC50计算器计算。实验设3个复孔。
1.3实验结果
实验结果如表1所示。结果表明,本发明化合物对IDO1的活性具有显著的抑制作用。其中,化合物4f的活性最强(IC50:6.08μM)。
表1本发明化合物对IDO1的抑制活性
2.T淋巴细胞的增殖实验
2.1实验方法
B16F1细胞处理:吸去培养基(高糖DMEM,10%FBS),PBS洗1-2次。加入0.25%胰酶消化。吸去胰酶,加入培养基,将细胞吹打下来,转移至1.5mL离心管中,离心,吸去上清,加入1mL DMEM培养基重新悬浮细胞。加入丝裂霉素C(终浓度25μg/ml),吹打混勾,37℃,水浴30min,RP1640洗3次,细胞计数,待用。
脾脏细胞的制备:取C57/BL6小鼠,摘眼球放血处死,无菌取出脾脏放入含有2mL无菌的预冷RPMI 1640培养基的35mm的培养皿中,用5mL注射器针芯轻轻将脾细胞挤出。再加入2mL培养基,用5mL移液管反复吹打直至悬液均匀。将细胞悬液用70μm滤器过滤,300g离心5min(4℃)。弃上清后脾细胞加入10mL Tris-NH4Cl,吹均,静置2-3min,300g离心5min(4℃),去除红细胞。弃上清后,再用PRMI 1640洗涤两次,待用。
1)将处理过的B16F1细胞2×104个/孔(剌激细胞),脾脏淋巴细胞1×106个/孔(反应细胞),加入96孔板,加入RP1640(10%FBS),补齐至200μL。
2)分组:给药组(剌激细胞+反应细胞+对应化合物),空白对照(只加反应细胞),模型组(剌激细胞+反应细胞),除空白对照外,其他组均加入ConA(终浓度5μg/ml),置于37℃、湿度95%、5%CO2的培养箱中培养,培养48h。
3)加入20μL MTT(终浓度4mg/ml)培养箱中继续培养4h,酶标仪测定570nm波长处吸光度值;计算T淋巴细胞增殖率:
T淋巴细胞增殖率(%)=[给药孔(T淋巴细胞+B16F1细胞+IDO1抑制剂)OD值一对照孔(T淋巴细胞+B16F1细胞)OD值]/对照孔(T淋巴细胞+B16F1细胞)OD值×100%
2.2实验结果
在混合淋巴细胞反应体系中,B16F1细胞高表达IDO1,对T淋巴细胞的增殖能够产生抑制作用。当加入化合物4e、4f和6c(3倍IC50浓度)培养48h后,利用MTT检测T淋巴细胞的增殖,增殖率为29.96%、52.25%和27.22%,说明化合物4e、4f和6c能显著增加T淋巴细胞的增殖。
3.对调节性T淋巴细胞的影响
3.1实验方法
将处理过的B16F1细胞(8×104个孔),脾脏淋巴细胞(106个孔,使用5μg/mL的ConA刺激)加入24孔板中,加入对应浓度的化合物后置于37℃、湿度95%、5%CO2的培养箱中培养48h;收集上清液测试ELISA,使用抗CD4、抗CD25、抗FOCP3抗体染色,在流式细胞仪中检测T细胞的分化。
3.2实验结果
当原始T淋巴细胞与黑色素瘤细胞株B16F1共培养时,调节性T淋巴细胞的数量和仅含原始T淋巴细胞的实验组(5.1%)相比上升了2倍(11.7%)。当化合物4e、4f和6c(3倍IC50浓度)加入体系中后能够明显逆转了这种效应(分别下降为6.0%、8.7%和7.1%),说明化合物4e、4f和6c能够通过抑制IDO1逆转原始T淋巴细胞向调节性T淋巴细胞的转化。
4.对IDO1表达的影响
4.1实验方法
Hela细胞以2×105每孔的密度种于6孔板培养,于37℃,5%CO2条件下培养12h。空白对照(只加培养基),模型组(加入IFN-γ、对应阳性药),药物处理组(加入IFN-γ、对应化合物),于37℃,5%CO2条件下培养24h,收集细胞,Western blot检测IDO1表达。
4.2实验结果
实验结果表明,化合物4e、4f和6c不影响Hela细胞中IDO1的表达,说明化合物4e、4f和6c是通过抑制IDO1的活性来逆转IDO1介导的免疫抑制。
Claims (10)
1.通式(I)所示的苯并五元杂环类化合物或其药学上可接受的盐:
其中:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表C、O、S、NH或N;
B代表O、S或NH2;
R1代表氢、卤素、硝基、羟基、氰基、氨基或C1-C10烷基;
R2代表氢、C1-C4烷基、C1-C10烷基C(O)R3、-C(O)NR4R5、-C(O)R3、C6-C10芳基、(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或-(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基、甲氧基或R3;
R3、R4、R5可以相同或不同,代表氢、C1-C8烷基、C3-C6环烷基、C6-C10芳基、-(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基或甲氧基。
2.根据权利要求1所述的苯并五元杂环类化合物或其药学上可接受的盐,其特征在于:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表O、NH或N;
B代表O或NH2;
R1代表氢、卤素、硝基、羟基或氨基;
R2代表氢、C1-C4烷基、C1-C10烷基C(O)R3、-C(O)NR4R5、-C(O)R3、C6-C10芳基、-(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或-(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基、甲氧基或R3;
R3、R4、R5可以相同或不同,代表氢、C1-C8烷基、C3-C6环烷基、C6-C10芳基、(C1-C5)烷基(C6-C10)芳基、C1-C10芳杂环基或(C1-C5)烷基(C1-C10)芳杂环基;其中所述的芳杂环基团可任选地包含一个或多个选自O、S或N的其它杂原子;所述的烷基、芳基或芳杂环基可任选地被下述相同或不相同的取代基单取代至五取代,所述的取代基选自:氢、卤素、羟基或甲氧基。
3.根据权利要求2所述的苯并五元杂环类化合物或其药学上可接受的盐,其特征在于:
α和β代表一个单键或双键;当α为单键时,β为双键;当α为双键时,β为单键;
A代表O、NH或N;
B代表O或NH2;
R1代表氢、氯、氟、硝基或氨基;
R2任选自:
4.根据权利要求1所述的苯并五元杂环类化合物或其药学上可接受的盐,其特征在于所述化合物选自:
5.根据权利要求1所述的苯并五元杂环类化合物的制备方法,其特征在于:
a)当A为O,B为O时,通式(I)所示化合物的制备方法为:不同取代的邻氨基苯酚与CDI发生缩合反应制得中间体1,1与不同取代的α-氯代苯乙酮反应制得2a-f,2a-f经硼氢化钠还原制得3a-f;1与不同取代的芳烷基氯反应制得4a-j,4i被还原制得5;1与不同的酰氯反应制得6a-c;1与不同胺类化合物反应制得7a-c;其合成路线如下:
其中,R1和R2的定义如权利要求1所述;
b)当A为NH,B为O时,通式(I)所示化合物的制备方法为:2-苯并咪唑酮与α-氯代-4′-氟苯乙酮反应制得8,8经硼氢化钠还原制得9;其合成路线如下:
其中,R1和R2的定义如权利要求1所述;
c)当A为N,B为NH2时,通式(I)所示化合物的制备方法为:1H-2-氨基苯并咪唑经Boc保护制得10,10与酰氯反应制得11,11脱去Boc取代基制得12;其合成路线如下:
其中,R1和R2的定义如权利要求1所述。
6.一种药物组合物,其由治疗上有效量的活性组分和药学上可接受的辅料组成;所述的活性组分包括如权利要求1-4中任一项所述的苯并五元杂环类化合物(I)或其药学上可接受的盐;所述的药学上可接受的辅料包括药学上可接受的载体、稀释剂和/或赋形剂。
7.权利要求1-4中任一项所述的化合物、其立体异构体、其药学上可接受的盐或权利要求6中所述的药物组合物在制备吲哚胺2,3-双加氧酶1抑制剂中的应用,所述的吲哚胺2,3-双加氧酶1抑制剂用于治疗吲哚胺2,3-双加氧酶1介导的免疫抑制的相关疾病患者,所述吲哚胺2,3-双加氧酶1介导的免疫抑制的相关疾病为癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症或自身免疫性疾病。
8.权利要求1-4中任一项所述的化合物其药学上可接受的盐或权利要求6中所述的组合物在制备药物中的用途,所述药物用于治疗患者的癌症、病毒感染、神经变性疾病、白内障、器官移植排斥、抑郁症或自身免疫性疾病。
9.根据权利要求7-8所述的应用,其中所述的癌症为恶性黑色素瘤、肺癌、乳腺癌、胃癌、结肠癌、膀胱癌、胰腺癌、淋巴癌、白血病、前列腺癌、睾丸癌、肾癌、脑癌、头颈癌、卵巢癌、宫颈癌、子宫内膜癌、间皮瘤、甲状腺癌、肝癌和食管癌中的一种或多种;所述的病毒感染为人类免疫缺陷病毒、乙型肝炎病毒、丙型肝炎病毒、流感病毒、脊髓灰质炎病毒、巨细胞病毒、柯萨奇病毒、人类乳头状瘤病毒、爱泼斯坦-巴尔病毒和水痘-带状疱疹病毒中的一种或多种引起的感染;所述的神经变性疾病为记忆障碍症、阿尔茨海默病、认知障碍症、老年痴呆症、帕金森病、帕金森综合症和运动障碍性疾病中的一种或多种;所述的自身免疫性疾病为类风湿性关节炎、系统性红斑狼疮、皮肌炎、硬皮病、结节性脉管炎、多发性硬化症、肾病、重症肌无力、混合性结缔组织病、银屑病、肝病、内分泌相关疾病和由于感染引起的自身免疫反应中的一种或多种。
10.根据权利要求7-9所述的应用,其特征在于:进一步给予所述疾病患者施用一种或多种化疗剂、靶向抗肿瘤药物、免疫检查点抑制剂、免疫检查点激动剂、抗肿瘤疫苗、抗病毒剂、抗病毒疫苗、细胞因子疗法、过继性细胞免疫治疗或放射治疗;所述的化疗剂为烷化剂、微管蛋白抑制剂、拓扑酶抑制剂、铂类药物、抗代谢类药物或激素类抗肿瘤药物;所述的靶向抗肿瘤药物为蛋白激酶抑制剂、蛋白酶体抑制剂、异柠檬酸脱氢酶抑制剂、基于表观遗传学的抗肿瘤药物或细胞周期信号通路抑制剂;所述的免疫检查点抑制剂为CTLA-4抑制剂、PD-1抑制剂、PD-L1抑制剂、PD-L2抑制剂、TIM-3抑制剂、VISTA抑制剂、LAG3抑制剂、TIGIT抑制剂、A2AR抑制剂或VTCN1抑制剂;所述的免疫检查点激动剂为STING激动剂、4-1BB激动剂、OX40激动剂、RORγ激动剂或ICOS激动剂。
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