An effective kinetic resolution of racemic α-arylpropanoic acids, α-arylbutanoic acids, and β-substituted-α-arylpropanoic acids with bis(9-phenanthryl)methanol as a new achiral nucleophile in the asymmetric esterification using carboxylic anhydrides and the acyl-transfer catalyst
作者:Kenya Nakata、Yu-suke Onda、Keisuke Ono、Isamu Shiina
DOI:10.1016/j.tetlet.2010.08.008
日期:2010.10
kinetic resolution of racemic α-arylalkanoic acids with achiral alcohols is described. It was determined that bis(9-phenanthryl)methanol is a suitable nucleophile which reacts with the intermediary mixed anhydrides generated from aromatic anhydrides with α-arylpropanoic acids or β-substituted-α-arylpropanoic acids in the presence of (+)-benzotetramisole to produce the corresponding optically active esters
描述了用非手性醇动力学拆分外消旋α-芳基链烷酸的一般方法。已确定双(9-菲基)甲醇是合适的亲核试剂,它在(+)-苯并四咪唑存在下,与由芳族酸酐与α-芳基丙酸或β-取代-α-芳基丙酸生成的中间混合酸酐反应,生成在非常温和的条件下产生具有高ee值的相应旋光酯。