The first enantiomerically pure synthesis of (2S,1′S)-(cyclopent-2-enyl)glycine by boron trifluoride mediated asymmetric 1,3-diploar cycloaddition
作者:Nobuy Katagiri、Makoto Okada、Yoshihiro Morishita、Chikara Kaneko
DOI:10.1039/cc9960002137
日期:——
Chiral spiro nitrone 3, treated with (3-trimethylsilyl)cyclopent-1-ene in the presence of BF3 . Et(2)O, gives the 1,3-dipolar cycloadduct 4 as a single isomer, which is converted to (2S,1'S)-(cyclopent-2-enyl)glycine (2S,1'S)-7 by alkaline hydrolysis, catalytic reduction and BF3 mediated alkene formation.