Stereoselective synthesis of anti-β-amino-α-hydroxy acid derivatives using nucleophilic epoxidation of 1-arylthio-1-nitroalkenes
作者:Lydia Ambroise、Richard F.W Jackson
DOI:10.1016/0040-4039(96)00252-3
日期:1996.3
Reaction of lithium t-butylperoxide with 1-arylthio-1-nitroalkenes 5, prepared by condensation of (4-tolylthio)nitromethane with N-(Boc)-protected α-amino aldehydes, leads to the formation of oxazolidinones rather than the expected oxiranes. Initially, a mixture of cis 8 and trans 9 diastereoisomers is formed, but upon exposure to silica gel complete conversion to the cis-diastereoisomers 8 takes place
叔丁基过氧化物锂与1-芳硫基-1-硝基烯烃5的反应,是通过(4-甲苯硫基)硝基甲烷与N-(Boc)保护的α-氨基醛缩合制备的,导致形成恶唑烷酮而不是预期的恶唑烷酮。最初,形成顺式8和反式9非对映异构体的混合物,但是当暴露于硅胶时,完全转化为顺式-非对映异构体8。