An Anionic Nucleophilic Catalyst System for the Diastereoselective Synthesis of trans-β-Lactams
摘要:
[GRAPHICS]Trans-disubstituted beta-lactams show increasing utility and prominence in numerous pharmaceutical applications, making their asymmetric synthesis an attractive goal for chemists. We introduce an anionic, nucleophilic catalyst system that provides an efficient, diastereoselective route to trans-disubstituted beta-lactams, a complement to our previously described catalytic methodology for generating the corresponding cis diastereomers. This catalytic, "switch mechanism" process allows for flexibility in the stereoselective synthesis of beta-lactams, producing either cis or trans products as desired from the same substrates.
An Anionic Nucleophilic Catalyst System for the Diastereoselective Synthesis of <i>trans</i>-β-Lactams
作者:Anthony Weatherwax、Ciby J. Abraham、Thomas Lectka
DOI:10.1021/ol0511070
日期:2005.8.1
[GRAPHICS]Trans-disubstituted beta-lactams show increasing utility and prominence in numerous pharmaceutical applications, making their asymmetric synthesis an attractive goal for chemists. We introduce an anionic, nucleophilic catalyst system that provides an efficient, diastereoselective route to trans-disubstituted beta-lactams, a complement to our previously described catalytic methodology for generating the corresponding cis diastereomers. This catalytic, "switch mechanism" process allows for flexibility in the stereoselective synthesis of beta-lactams, producing either cis or trans products as desired from the same substrates.