Microwave-Assisted Stereoselective One-Pot Synthesis of Symmetrical and Unsymmetrical 2,5-Diketopiperazines from Unprotected Amino Acids
作者:Manuel Jainta、Martin Nieger、Stefan Bräse
DOI:10.1002/ejoc.200800605
日期:2008.11
The facile condensation of unprotected aminoacids by a phosphite-promoted one-step coupling reaction is a highly efficient synthesis to generate stereoselective and optically pure symmetrical and unsymmetrical functionalized diketopiperazines. The use of microwaves enhanced by small amounts of ionic liquid is accompanied by significant improvement in reaction times and yields. Simple filtration through