Efficient three-step sequence for the deamination of α-aminoesters. Application to the synthesis of CysLT1 antagonists
作者:Alfredo González、Daniel Pérez、Carles Puig、Hamish Ryder、Jordi Sanahuja、Laia Solé、Jordi Bach
DOI:10.1016/j.tetlet.2009.03.118
日期:2009.6
and efficient three-step sequence for the deamination of α-aminoesters is reported. This method is based on the NaBH4-mediated selective reduction of α-diazoesters to α-hydrazonoesters and has been successfully applied to the deamination of several representative α-aminoesters including some l-cysteine ethyl ester derivatives, key intermediates in the synthesis of a series of CysLT1 antagonists.
报道了一种用于α-氨基酯的脱氨的实用且有效的三步顺序。该方法基于NaBH 4介导的将α-重氮酸酯选择性还原为α-肼基酸酯的方法,已成功应用于多种代表性的α-氨基酯的脱氨反应,包括一些1-半胱氨酸乙酯衍生物,这是合成α-半胱氨酸的关键中间体。 CysLT1拮抗剂系列。