Highly Stereoselective Reactions of <i>γ</i>-Sulfinyl Carbanions with Achiral Imines
作者:José Luis García Ruano、José Alemán、Alejandro Parra
DOI:10.1080/10426500590910800
日期:2005.3.2
Abstract Lithium 2-p-tolylsulfinylbenzyl carbanions react with different N-substituted imines affording 1,2-diaryl ethyl (and propyl) amines with a high stereoselectivity control at both benzyllic (only dependent of the sulfur configuration) and iminic carbons. The anti:syn ratio, ranging between > 96: < 4 and < 2: > 98, dependent on the electronic density at nitrogen.
Quick Access to Optically Pure 2-(1-Hydroxybenzyl)piperidine and Pyrrolidine
作者:José Luis García Ruano、José Alemán、M. Belén Cid
DOI:10.1055/s-2006-926306
日期:——
Opticallypure 2-(l-hydroxybenzyl)piperidine and pyrrolidine were prepared by reaction of oxygenated 2-(p-tolylsulfinyl)benzyl carbanions with the appropriate chlorinated N-sulfinylimines followed by subsequent elimination of the sulfinylgroups. The main reaction is a tandem process involving nucleophilic addition of the sulfinylbenzyl carbanion to the C=N bond followed by intramolecular elimination
Stereocontrolled Reactions Mediated by a Remote Sulfoxide Group: Synthesis of Optically Pure <i>a</i><i>nti</i>-β-Amino Alcohols
作者:José L. García Ruano、José Alemán
DOI:10.1021/ol0358410
日期:2003.11.1
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.