Three-Step Synthesis of Cyclopropyl Peptidomimetics
摘要:
An efficient approach to novel cyclopropyl peptidomimetics has been developed. The synthetic route involves a cyclopropanation using ethyl (dimethylsulfuranylidene)acetate (EDSA) as the key step and affords a cyclopropyl peptidomimetic core in three steps from protected amino acid Weinreb amides.
Three-Step Synthesis of Cyclopropyl Peptidomimetics
摘要:
An efficient approach to novel cyclopropyl peptidomimetics has been developed. The synthetic route involves a cyclopropanation using ethyl (dimethylsulfuranylidene)acetate (EDSA) as the key step and affords a cyclopropyl peptidomimetic core in three steps from protected amino acid Weinreb amides.
Stereoselective cyclopropanation of a series of amino acid-derived enones to afford cyclopropyl keto-esters is reported, using a Michael-induced ring closure. The use of quinine and quinidine ether catalysts in the cyclopropanation step afforded the cyclopropyl keto-esters with high stereoselectivity. Results follow a consistent pattern, with the pseudoenantiomeric catalysts leading to opposite stereoselectivity
作者:Norma K. Dunlap、Jacob Basham、Matthew Wright、Katrina Smith、Omar Chapa、Jihun Huang、Will Shelton、Yaroslav Yatsky
DOI:10.1016/j.tetlet.2013.09.106
日期:2013.11
Nitrocyclopropanation of amino-acid derived enones has led to a series of cyclopropyl peptidomimetics suitable for further elaboration to compounds with the potential for biological activity. (C) 2013 Elsevier Ltd. All rights reserved.