Chemical Conversion of Cyclic .ALPHA.-Amino Acids to Cyclic .ALPHA.-Aminophosphonic Acids.
作者:Mamoru KANAME、Hironori MASHIGE、Shigeyuki YOSHIFUJI
DOI:10.1248/cpb.49.531
日期:——
oxidative decarboxylation of cyclic alpha-amino acids having urethane-type N-protecting groups with lead tetraacetate [Pb(OAc)4] gave 2-hydroxy derivatives, which were transformed into the corresponding alpha-aminophosphonic acid esters by treatment of trialkyl phosphites in the presence of Lewis acids. Deprotection and ester cleavage of the products in the usual manner afforded cyclic alpha-aminophosphonic
用四乙酸铅[Pb(OAc)4]对具有氨基甲酸酯型N-保护基的环状α-氨基酸进行氧化脱羧,得到2-羟基衍生物,通过处理亚磷酸三烷基酯将其转化为相应的α-氨基膦酸酯。路易斯酸的存在。以常规方式对产物进行脱保护和酯裂解,得到环状α-氨基膦酸。已经实现了将五元和六元环状α-氨基酸方便地化学转化为相应的环状α-氨基膦酸。