反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- 80 °C
PROCEDURE
实验过程
To the solution of 2-[5-(4-bromo-3-methoxycarbonyl-phenyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (158 mg, 0.35 mmol) and 2-{5-[3-Methoxycarbonyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (166 mg, 0.33 mmol) in 1,2-dimethoxyether (3 ml) and water (1 ml) was added sodium bicarbonate (91 mg, 1.1 mmol), followed by Pd(PPh3)4 (15 mg) and PdCl2(dppf)CH2Cl2 (15 mg). The mixture was heated at 80° C. for 7 hours. The mixture was diluted with EtOAc, and was washed with water and brine, and was dried with sodium sulfate. Concentration and purification by flash column chromatography (EtOAc) gave 4,4′-Bis-[2-(1-tert-butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-biphenyl-2,2′-dicarboxylic acid dimethyl ester (85 mg). m/z: 741.0 (M+H)+, 370.9 (M+2H)+/2.
WORKUP
后处理
- washwas washed with water and brine
- dry with materialwas dried with sodium sulfate
- concentrationConcentration and purification by flash column chromatography (EtOAc)