Stereocontrolled Reactions Mediated by a Remote Sulfoxide Group: Synthesis of Optically Pure anti-β-Amino Alcohols
摘要:
A one-step synthesis of enantiomerically pure anti-1,2-amino alcohol derivatives has been achieved by reaction of prochiral oxygenated 2-p-tolylsulfinylbenzyl carbanions with N-sulfinylimines bearing the same configuration at sulfur.
Optically pure trans-2,3-disubstituted N-sulfinyl aziridines. Regio- and stereoselective opening mediated by the sulfinyl group
作者:Yolanda Arroyo、Ángela Meana、J. Félix Rodríguez、Mercedes Santos、M. Ascensión Sanz-Tejedor、José L. García-Ruano
DOI:10.1016/j.tet.2006.06.072
日期:2006.9
A newentry to optically pure trans-2,3-disubstituted N-sulfinyl aziridines starting from 1,2-aminosulfides, involving formation of a sulfonium salt intermediate followed by intramolecular nucleophilic attack by the sulfinamide nitrogen atom, is reported. The regio- and stereoselective opening of the aziridine ring can be achieved by anchimeric assistance of the sulfinyl group.
A Highly Diastereoselective MgI<sub>2</sub>-Mediated Ring Expansion of Methylenecyclopropanes
作者:Mark E. Scott、Wooseok Han、Mark Lautens
DOI:10.1021/ol048769u
日期:2004.9.1
A highly diastereoselective MgI2-mediated ring expansion of methylenecyclopropane amides to functionalized pyrrolidines has been developed using chiral aromatic sulfinimines. The 2,3,4-trisubstituted pyrrolidines were isolated in generally good to excellent yields and in excellent diastereoselectivities for aromatic and heterocyclic sulfinimines.
A New Access to the Synthesis of Optically Pure β-Aminosulfides
作者:Y. Arroyo、A. Meana、J. F. Rodríguez、M. Santos、M. A. Sanz-Tejedor、J. L. García Ruano