Synthesis of Hydroxypiperidinecarboxylic Acids from Pyridinedicarboxylates.
作者:Anders Damsgaard、Rita Hazell、Mikael Bols、Kjeld Schaumburg、Zong-Hui Jiang、Shi-Ping Yan、Geng-Lin Wang、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren
DOI:10.3891/acta.chem.scand.53-0521
日期:——
(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。