A Versatile Synthesis of N Carboxy-α,β-didehydro-α-amino Acid Anhydrides (4-Alkylidene-2,5-oxazolidinediones) α-Azidocarboxylic acids 1 react with phosgene in the presence of catalytic amounts of sodium perrhenate in dimethoxyethane at 85°C to give N-carboxy-α,β-didehydroamino acid anhydrides (4-alkylidene-2.5-oxazolidinediones) 2 in good yields.
一种多功能合成N羧基-α,β-二脱氢-
α-氨基酸酸酐(4-烷基亚烯-
2,5-噁唑烷二酮)α-
叠氮羧酸1与
光气在
二甲氧基乙烷中存在催化量的
钠铼酸盐的条件下,在85°C下反应,生成良好产率的N-羧基-α,β-二脱氢
氨基酸酸酐(4-烷基亚烯-
2,5-噁唑烷二酮)2。