An Efficient Synthesis of Enantiomerically Pure (<i>R</i>)-Pipecolic Acid, (<i>S</i>)-Proline, and Their <i>N</i>-Alkylated Derivatives
作者:Antoine Fadel、Nabil Lahrache
DOI:10.1021/jo062382i
日期:2007.3.1
Enantiomericallypure (R)-(+)-pipecolic acid was synthesized in four steps and 42% overall yield starting from dihydropyran and (R)-α-methylbenzylamine. A general short strategy is also described for preparing (S)-proline (47.5% overall yield) and derivatives.