Synthesis of Novel Enantiopure 4-Hydroxypipecolic Acid Derivatives with a Bicyclic β-Lactam Structure from a Common 3-Azido-4-oxoazetidine-2-carbaldehyde Precursor
作者:Benito Alcaide、Pedro Almendros、Amparo Luna、Teresa Martínez del Campo
DOI:10.1021/jo702405h
日期:2008.2.1
Two different stereocontrolled accesses to new 4-hydroxypipecolicacid analogues with a bicyclic β-lactam structure have been developed by using intramolecular reductive amination or allenic hydroamination reactions in 2-azetidinone-tethered azides. The access to the cyclization precursors was achieved from 3-azido-4-oxoazetidine-2-carbaldehyde via metal-mediated carbonyl−allenylation in aqueous environment