An easy access to (S)-pyrrolidinones and -pyrrolidines from chiral benzylic malonates
作者:Philippe Arzel、Vincent Freida、Philippe Weber、Antoine Fadel
DOI:10.1016/s0957-4166(99)00425-5
日期:1999.10
From chiral benzylic malonic acid esters (R)-(+)-4, available with high enantiomeric excesses by enzymatic hydrolysis (PLE acetonic powder), enantiomerically enriched pyrrolidinones 1 and pyrrolidines 2 were prepared. This rapid and competitive method was developed via enol ether formation, and subsequent one-pot cyclisation, in good overall yield.
由手性苄基丙二酸酯(R)-(+)- 4,通过酶水解可得到高对映体过量(PLE丙酮粉末),制备了对映体富集的吡咯烷酮1和吡咯烷2。这种快速而竞争性的方法是通过烯醇醚的形成以及随后的一锅环化开发的,具有良好的总收率。