CN105837416B - 一种铜配合物催化醇类选择性氧化制备醛或酮的方法 - Google Patents
一种铜配合物催化醇类选择性氧化制备醛或酮的方法 Download PDFInfo
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- 150000001299 aldehydes Chemical class 0.000 title claims abstract description 20
- 150000002576 ketones Chemical class 0.000 title claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 14
- 230000003647 oxidation Effects 0.000 title claims abstract description 13
- 150000001298 alcohols Chemical class 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 11
- 150000004699 copper complex Chemical class 0.000 title claims description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000012043 crude product Substances 0.000 claims abstract description 9
- 239000000376 reactant Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- -1 copper metal complex Chemical class 0.000 claims abstract description 7
- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000047 product Substances 0.000 claims abstract description 6
- NQFNBCXYXGZSPI-UHFFFAOYSA-L copper;diacetate;dihydrate Chemical compound O.O.[Cu+2].CC([O-])=O.CC([O-])=O NQFNBCXYXGZSPI-UHFFFAOYSA-L 0.000 claims abstract description 5
- 150000003333 secondary alcohols Chemical class 0.000 claims abstract description 4
- 150000003138 primary alcohols Chemical class 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 10
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- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 7
- 150000001879 copper Chemical class 0.000 abstract description 3
- 150000004696 coordination complex Chemical class 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 description 6
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 5
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- ZRSNZINYAWTAHE-UHFFFAOYSA-N p-methoxybenzaldehyde Chemical compound COC1=CC=C(C=O)C=C1 ZRSNZINYAWTAHE-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 3
- 238000001819 mass spectrum Methods 0.000 description 3
- AUWDOZOUJWEPBA-UHFFFAOYSA-N 2-(4-methoxyphenyl)ethanol Chemical compound COC1=CC=C(CCO)C=C1 AUWDOZOUJWEPBA-UHFFFAOYSA-N 0.000 description 2
- WRMNZCZEMHIOCP-UHFFFAOYSA-N 2-phenylethanol Chemical compound OCCC1=CC=CC=C1 WRMNZCZEMHIOCP-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 2
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- 230000002194 synthesizing effect Effects 0.000 description 2
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- DTQZKOBDNLNBCU-UHFFFAOYSA-N 1-methylimidazole Chemical compound CN1C=CN=C1.CN1C=CN=C1 DTQZKOBDNLNBCU-UHFFFAOYSA-N 0.000 description 1
- WAPNOHKVXSQRPX-UHFFFAOYSA-N 1-phenylethanol Chemical compound CC(O)C1=CC=CC=C1 WAPNOHKVXSQRPX-UHFFFAOYSA-N 0.000 description 1
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- XPNGNIFUDRPBFJ-UHFFFAOYSA-N alpha-methylbenzylalcohol Natural products CC1=CC=CC=C1CO XPNGNIFUDRPBFJ-UHFFFAOYSA-N 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
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- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/29—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
- B01J31/1805—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
- B01J31/181—Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
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- C07C47/54—Benzaldehyde
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Abstract
一种铜配合物催化醇类选择性氧化制备醛或酮的方法,制备方法包括以下步骤:在圆底烧瓶中加入乙醇、N‑甲基咪唑、二水乙酸铜、2、2、6、6‑四甲基‑1‑氧哌啶、去离子水,反应得反应物;将上述反应物用乙酸乙酯萃取,得粗产物;将粗产物在乙醇中重结晶,得铜金属配合物催化剂;加入上述铜催化剂、2、2、6、6‑四甲基‑1‑氧哌啶伯醇或仲醇以及去离子水,反应反应物用乙酸乙酯萃取后,即得醛或酮产品。本发明的优点是:利用金属配合物作为催化剂,以水为溶剂,催化氧化醇为醛或酮。制备方便、价格较低、收率高,纯度大于98%,可进行大批量合成,适合工业生产应用。
Description
技术领域
本发明涉及一种催化醇类选择性氧化制备醛或酮的方法,尤其涉及一种通过金属铜配合物催化醇来合成醛或酮的方法。
背景技术
醇选择性氧化成醛或酮,是广泛应用于现代合成化学和工业的关键反应。近年来,原子经济的氧化方法,包括催化氧化的发展取得重大进展,催化氧化低成本、环境友好的特点最具有吸引力。然而,大多数现有的催化氧化反应过程中需要使用的环境不良溶剂,如甲苯和氯化烃。如果在水代替有机溶剂进行反应,从“绿色”的化学和技术的角度来看,有明显的优势。例如,在水中发生氧化反应比在有机溶剂中更便宜,更安全,而且产物更容易用简单的方法分离,因而催化剂可以回收和重复使用。本发明报道了在水中催化氧化醇成为醛或酮的反应。
发明内容
本发明目的在于提供操作简便、反应温和、成本低、收率高的催化醇合成醛或酮的方法。
一种铜配合物催化醇类选择性氧化制备醛或酮的方法,其制备方法包括以下步骤:
A.制备铜金属配合物催化剂
a.合成反应:在圆底烧瓶中加入乙醇1.8-2.2 mL、N-甲基咪唑0.08-0.12 mmol、二水乙酸铜Cu(OAc)2 0.040-0.60 mmol、 2、2、6、6-四甲基-1-氧哌啶0.040-0.60 mmol,接着加入4-6 mL去离子水,反应在室温下暴露在空气中进行, 得反应物;
b.萃取,
将上述反应物用乙酸乙酯萃取,将有机相分离,并用旋转蒸发器除去溶剂, 得粗产物;
c. 结晶: 将粗产物在乙醇中重结晶, 得铜金属配合物催化剂;
B. 制备醛或酮
在圆底烧瓶中加入上述铜催化剂0.02 mmol、2、2、6、6-四甲基-1-氧哌啶0.050mmol、伯醇或仲醇(1 mmol)以及5 mL去离子水,反应在室温下暴露在空气中搅拌2小时,反应物用乙酸乙酯萃取后,即得醛或酮产品。
所述的N-甲基咪唑、乙酸铜和2、2、6、6-四甲基-1-氧哌啶的投料摩尔比是2:0.8-1.2: 0.8-1.2。
所述的铜催化剂投料为底物的1.8-2.2%, 2、2、6、6-四甲基-1-氧哌啶的投料为底物的4.5-5.5%。
所述的溶剂为水。
所述的催化剂和醇的投料摩尔比是1:45-55。
本发明的优点是:利用金属配合物作为催化剂,以水为溶剂,催化氧化醇为醛或酮。制备方便、价格较低、收率高,纯度大于98%可进行大批量合成,适合工业生产应用。应用广泛,可用于制备多种药物中间体的原材料。
具体实施方式
一种催化氧化醇为醛或酮的方法, 包括:先制备一种铜金属配合物催化剂,在25mL圆底烧瓶中加入乙醇(2.0 mL)、N-甲基咪唑(N-Methylimidazole)(0.10 mmol)、二水乙酸铜Cu(OAc)2 (0.050 mmol)、 2、2、6、6-四甲基-1-氧哌啶(TEMPO)(0.050 mmol),接着加入5 mL去离子水,反应在室温下暴露在空气中搅拌进行,之后再加入乙酸乙酯萃取。将有机相分离,并用旋转蒸发器除去溶剂。粗产物在乙醇中重结晶后的棕色固体催化剂。后用该催化剂室温下在水相中将醇氧化成醛或酮。 在25 mL圆底烧瓶中加入上述铜催化剂(0.02mmol,2%),2、2、6、6-四甲基-1-氧哌啶(TEMPO)(0.050 mmol, 5%) ,原料醇(1 mmol)以及5mL去离子水,反应在室温下暴露在空气中搅拌2小时,产品用乙酸乙酯萃取后,即得醛或酮产品(纯度>98%)。所述的溶剂为:水。所述的醇为:脂肪或芳香伯醇或仲醇。
下面结合具体实施例对本发明作进一步说明。
本发明实施例中的铜配合物催化氧化醇为醛或酮,反应的通式如下:
实施例1:铜配合物的合成
将N-甲基咪唑 (82 毫克,0.001摩尔)、2、2、6、6-四甲基-1-氧哌啶 (31.2 毫克,0.0005摩尔) 溶解在20毫升乙醇中,向其中加入二水乙酸铜 (108.5 毫克, 0.0005摩尔)的水(50毫升)溶液。所得浅棕色溶液在室温空气中搅拌30分钟,然后滤掉灰绿色沉淀,滤液用乙酸乙酯萃取后,有机相干燥后过滤,减压蒸馏除去溶剂后得棕色粗产品。将粗产品溶解在乙醇中,在空气中缓慢挥发2天后,得到黄棕色块状晶体。产率:147毫克(85%)。紫外可见光谱UV-Vis: λmax/nm (1.0 × 10-5 mol dm-3, CH2Cl2) 270 (ε/103 dm3 mol−1 cm−153.6), 372 (8.5), 430 (6.70), 610 (0.33). 红外光谱FT-IR (solid, cm-1): 1655s,160s, 1536s, 1442m, 1370s, 1309w, 1228s, 1118w, 1073s, 1010s, 958m, 801s,747m, 658w. 元素分析(%) C24H36Cu2N8O8: C 41.68, H 5.25, N 16.20; found C 41.53,H 5.16, N 16.12%
实施例2:苯甲醛的合成
在25 mL圆底烧瓶中加入上述铜催化剂(13.8毫克,0.02 豪摩尔,2%)、2、2、6、6-四甲基-1-氧哌啶(TEMPO)(0.050 mmol, 5%)、苯乙醇(108毫克,1 豪摩尔)以及5 mL去离子水,反应在室温下暴露在空气中搅拌2小时后,所得溶液用乙酸乙酯萃取后,有机相通过水洗后,用无水硫酸镁干燥,减压除去容易后即得苯甲醛(纯度大于98%)。产率:101毫克(95%)。 核磁共振氢谱1H NMR (400 MHz, CDCl3) δ 9.92 (s, 1H), 7.83-7.78 (m, 2H),7.55-7.38 (m, 3H)。 质谱GC-MS (m/z): 106 (calc. 106)。
实施例3:4-甲氧基苯甲醛的合成
在25 mL圆底烧瓶中加入上述铜催化剂(13.8毫克,0.02 豪摩尔,2%)、2、2、6、6-四甲基-1-氧哌啶(TEMPO)(0.050 mmol,5%)、4-甲氧基苯乙醇(138毫克,1 豪摩尔)以及5 mL去离子水,反应在室温下暴露在空气中搅拌2小时后,所得溶液用乙酸乙酯萃取后,有机相通过水洗后,用无水硫酸镁干燥,减压除去容易后即得4-甲氧基苯甲醛(纯度大于98%)。产率:126毫克(93%)。 核磁共振氢谱1H NMR (400 MHz, CDCl3) δ 9.97 (s, 1H), 7.84 (d,J = 8.7 Hz, 2H), 7.01 (d, J = 8.8 Hz, 2H), 3.90 (s, 3H, HOCH3)。 质谱 GC-MS (m/z): 136 (calc. 136)。
实施例4:乙酰丙酮的合成
在25 mL圆底烧瓶中加入上述铜催化剂(13.8毫克,0.02 豪摩尔,2%)、2、2、6、6-四甲基-1-氧哌啶(TEMPO)(0.050 mmol,5%)、1-苯基乙醇(122毫克,1 豪摩尔)以及5 mL去离子水,反应在室温下暴露在空气中搅拌2小时后,所得溶液用乙酸乙酯萃取后,有机相通过水洗后,用无水硫酸镁干燥,减压除去容易后即得乙酰丙酮(纯度大于98%)。产率:115毫克(96%). 核磁共振氢谱1H NMR (400 MHz, CDCl3) δ 7.94 (d, J = 7.6 Hz, 2H), 7.55(t, J = 7.3 Hz, 1H), 7.44 (t, J = 7.5 Hz, 2H), 2.59 (s, 3H, CH 3)。 质谱 GC-MS(m/z): 120 (calc. 120)。
Claims (2)
1.一种铜配合物催化醇类选择性氧化制备醛或酮的方法,其特征在于制备方法包括以下步骤:
A.制备铜金属配合物催化剂
a.合成反应:在圆底烧瓶中加入乙醇1.8-2.2 mL、N-甲基咪唑0.08-0.12 mmol、二水乙酸铜0.040-0.60mmol、 2、2、6、6-四甲基-1-氧哌啶0.040-0.60 mmol,接着加入4-6 mL去离子水,反应在室温下暴露在空气中进行, 得反应物;
b.萃取,
将上述反应物用乙酸乙酯萃取,将有机相分离,并用旋转蒸发器除去溶剂, 得粗产物;
c. 结晶: 将粗产物在乙醇中重结晶, 得铜金属配合物催化剂;
B. 制备醛或酮
在圆底烧瓶中加入上述铜金属配合物催化剂0.02 mmol、2、2、6、6-四甲基-1-氧哌啶0.050 mmol、伯醇或仲醇1 mmol以及5 mL去离子水,反应在室温下暴露在空气中搅拌2小时,反应物用乙酸乙酯萃取后,即得醛或酮产品。
2.根据权利要求1所述的制备方法, 其特征在于:所述的N-甲基咪唑、二水乙酸铜和2、2、6、6-四甲基-1-氧哌啶的投料摩尔比是2:0.8-1.2: 0.8-1.2。
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