The synthesis of N-fluorenylmethoxycarbonyl-N,S-dimethyl-l-Cysteine (1) [Fmoc,Me-Cys(Me)-OH] and N-fluorenylmethoxycarbonyl-N-methyl-S-acetamidomethyl-l-Cysteine (2) [Fmoc,Me-Cys(Acm)-OH] is reported. The synthesis is characterized by a convenient two-step procedure from (R)-thiazolidine-4-carboxylic acid (3) via reduction and subsequent protection. Crystals of 1, which have been analyzed by single-crystal X-ray crystallography, are obtained after a simple crystallization at the end of the process, without purification of intermediates.
N-
芴基甲氧基羰基-N,S-二甲基-
L-半胱氨酸 (1) [Fmoc,Me-Cys(Me)-OH] 和 N-
芴基甲氧基羰基-N-甲基-S-乙酰
氨基甲基-
L-半胱氨酸 (2) 的合成报道了[Fmoc,Me-Cys(Acm)-OH]。该合成的特点是采用方便的两步程序,从 (R)-
噻唑烷-4-
羧酸 (3) 开始,经过还原和随后的保护。 1的晶体已通过单晶X射线晶体学分析,是在过程结束时经过简单结晶后获得的,无需纯化中间体。