(3RS,4SR,5SR)-5-Hydroxy-3-hydroxymethyl-4-piperidinecarboxylic acid 4,3'-lactone was synthesised in eight steps from ethyl glycinate via selective hydrolysis and reduction of 4,5-di-(methoxycarbonyl)-3-hydroxypyridine. The regioisomer (3RS,4RS,5SR)-5-hydroxy-4-hydroxymethyl-3-piperidinecarboxylic acid 3,4'-lactone was also synthesised. The regio- and stereo-chemistry of the reactions were confirmed by five X-ray crystallographic structure determinations.
(3RS,4SR,5SR)-5-羟基-3-羟甲基-4-
哌啶羧酸4,3'-内酯是通过从乙酰甘
氨酸出发,经过对4,5-二甲氧基羰基-3-
羟基吡啶进行选择性
水解和还原,分八步合成的。同时,区域异构体(3RS,4RS,5SR)-5-羟基-4-羟甲基-3-
哌啶羧酸3,4'-内酯也被合成。五次的X射线晶体结构测定确认了这些反应的区域异构和立体
化学性质。