作者:Paula M. T. Ferreira、Luís S. Monteiro
DOI:10.1002/ejoc.200600094
日期:2006.7
The methyl ester of N-tert-butoxycarbonyl-(Z)-β-bromo-β-(1,2,4-triazol-1-yl)dehydroalanine was prepared by treatment of the methyl ester of N-tert-butoxycarbonyl-(E)-β-(1,2,4-triazol-1-yl)dehydroalanine with N-bromosuccinimide (NBS), followed by Et3N. The reactivities of this compound and of our previously synthesized methyl ester of N-tert-butoxycarbonyl-β,β-dibromodehydroalanine towards several nucleophiles
N-叔丁氧羰基-(Z)-β-溴-β-(1,2,4-三唑-1-基)脱氢丙氨酸甲酯通过对N-叔丁氧羰基-( E)-β-(1,2,4-三唑-1-基)脱氢丙氨酸与 N-溴代琥珀酰亚胺 (NBS),然后是 Et3N。研究了该化合物和我们先前合成的 N-叔丁氧羰基-β,β-二溴脱氢丙氨酸甲酯对几种亲核试剂的反应性,发现这些化合物与氧亲核试剂反应生成相应的 α-烷氧基-β ,β-二取代丙氨酸。当 β,β-二溴脱氢丙氨酸衍生物用伯胺处理时,也会发生对 α-碳原子的加成,得到 α-氨基-β,β-二溴丙氨酸。β-溴-β-(1,2, 4-三唑-1-基)脱氢丙氨酸衍生物与胺类以高产率得到α-(烷基氨基)-β-(烷基亚氨基)丙氨酸。当在二氯甲烷中用二氧化硅处理时,这些亚氨基丙氨酸提供α-氨基甘氨酸。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany