Synthesis of oxazolidinyl azacycles via ring-closing olefin metathesis: a practical entry to the synthesis of deoxy-azasugars and hydroxypyrrolizidines
作者:Thangaiah Subramanian、Chang-Ching Lin、Chun-Cheng Lin
DOI:10.1016/s0040-4039(01)00635-9
日期:2001.6
l-serines, an expedient method for the preparation of oxazolidinyl piperidines, azepenes and azacyclooctenes was illustrated as a route to various deoxy-azasugars and hydroxypyrrolizidines. The ring-closing olefin metathesis of oxazolidinyl di-olefins was used as a key-step to construct the azacycles. Consecutive epoxidation, hydrolysis and transannulation of oxazolidinyl azacyclooctene led to hydroxypyrrolizidines
从d-和l-丝氨酸开始,说明了一种制备恶唑烷二基哌啶,氮杂环庚烷和氮杂环辛烯的简便方法,作为通往各种脱氧天竺葵和羟基吡咯烷核苷的途径。恶唑烷基二烯烃的闭环烯烃复分解用作构建氮杂环的关键步骤。恶唑烷二基氮杂环辛烯的连续环氧化,水解和环过环生成羟基吡咯烷核苷。