Stereoselective formation of optically active 2-oxy-1,3-oxazolidin-4-ones and an efficient synthesis of optically active secondary 2-pyrrolidones
作者:Yoji Omata、Akikazu Kakehi、Masashi Shirai、Akio Kamimura
DOI:10.1016/s0040-4039(02)01632-5
日期:2002.9
Treatment of (−)-O-acyllactamides or mandelamides with TBSOTf in the presence of base gives optically active 2-oxy-1,3-oxazolidin-4-ones stereoselectively, which serve as useful precursors for the preparation of optically active secondary 2-pyrrolidones via radical cyclization and subsequent one-step removal of mandelic acid.
在碱存在下,用TBSOTf处理(-)- O-酰基酰胺或扁桃酰胺,可以立体选择性地产生旋光的2-氧基-1,3-恶唑烷丁-4-酮,它们可用作制备旋光的仲2-羟基的有用前体。吡咯烷酮通过自由基环化和随后的一步去除扁桃酸的步骤。