作者:B. Paul、W. Korytnyk
DOI:10.1021/jm00230a004
日期:1976.8
Cysteine derivatives having diazo ketone and chloro ketone functions have been prepared. In order to effect adequate protection for modifying the carboxyl group, cysteine was converted to a thiazolidine derivative I, which was then converted to the N-acetyl derivative VII. The active ester method or activation with DCC yielded the diazo ketone derivative VIII. Similar treatment of the parent compound
已经制备了具有重氮酮和氯酮功能的半胱氨酸衍生物。为了对羧基进行有效的保护,将半胱氨酸转化为噻唑烷衍生物I,然后将其转化为N-乙酰基衍生物VII。活性酯法或用DCC活化产生重氮酮衍生物VIII。用DCC类似处理母体化合物I导致自缩合反应,得到二酮哌嗪VI。重氮酮衍生物VIII已用于制备α-氯酮衍生物X和半胱氨酸的同系物。用各种试剂对N-乙酰化的噻唑烷衍生物进行解封不能令人满意地进行。N-乙酰化的封闭酯XII与三氟乙酸的相互作用打开了噻唑烷环,得到了N-乙酰化的封闭二酯XIII和其他产物。发现氯酮衍生物X在细胞培养物中具有对小鼠乳腺腺癌的中等抑制活性。制备了S-(1-金刚烷基)-L-半胱氨酸,发现其没有活性。