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。