Straightforward Synthesis of α-Substituted Prolines by Cross-Metathesis
作者:Marco Lumini、Franca M. Cordero、Federica Pisaneschi、Alberto Brandi
DOI:10.1002/ejoc.200800044
日期:2008.6
The synthesis of several α-substituted N-Boc-protected prolines has been achieved by cross metathesis (CM) of N-Boc-allylproline 5 with terminal long chain alkenes and alkenes bearing hydroxy, silyloxy, ester, and O-acetylglucosamido groups. The CM occurred with good selectivity and short reaction time under microwave heating conditions, affording yields in the range of 40–92 %. Addition of Ti(OiPr)4