Highly Diastereoselective Alkylation of Aziridine-2-carboxylate Esters: Enantioselective Synthesis of LFA-1 Antagonist BIRT-377
作者:Aniruddha P. Patwardhan、V. Reddy Pulgam、Yu Zhang、William D. Wulff
DOI:10.1002/anie.200500923
日期:2005.9.26
Novel Ozone-Mediated Cleavage of the Benzhydryl Protecting Group from Aziridinyl Esters
作者:Aniruddha P. Patwardhan、Zhenjie Lu、V. Reddy Pulgam、William D. Wulff
DOI:10.1021/ol050597t
日期:2005.5.1
N-Benzhydryl aziridines-2-carboxylates can be readily obtained from the catalytic asymmetric aziridination reaction from N-benzhydrylimines and ethyl diazoacetate. Cleavage of the benzhydryl group by hydrogenolysis leads to ring opening when R = aryl. Surprisingly, ozone will selectively oxidize the benhydryl group in these aziridines even when R is an aryl group. This allows for a new deprotection strategy for these aziridines whose generality is explored.