Asymmetric alkylations using SuperQuat auxiliaries—an investigation into the synthesis and stability of enolates derived from 5,5-disubstituted oxazolidin-2-ones
作者:Steven D. Bull、Stephen G. Davies、Simon Jones、Hitesh J. Sanganee
DOI:10.1039/a809715a
日期:——
Studies on the alkylation of enolates derived from a range of N-acyl-5,5-dimethyloxazolidin-2-ones and N-acyl-5,5-diphenyloxazolidin-2-ones reveal that high yields and high diastereoselectivities are best obtained when homochiral 4-isopropyl-5,5-dimethyloxazolidin-2-one is employed as a chiral auxiliary.
Design, Synthesis, and Applications of Potential Substitutes of <i>t</i>-Bu-Phosphinooxazoline in Pd-Catalyzed Asymmetric Transformations and Their Use for the Improvement of the Enantioselectivity in the Pd-Catalyzed Allylation Reaction of Fluorinated Allyl Enol Carbonates
substitutes of t-Bu-PHOX in asymmetric catalysis is reported. The design relies on the incorporation of geminal substituents at C5 in combination with a substituent at C4 other than t-butyl (i-Pr, i-Bu, or s-Bu). Most of these new members of the PHOX ligand family behave similarly in terms of stereoinduction to t-Bu-PHOX in three palladium-catalyzed asymmetric transformations. Electronically modified ligands
[EN] TRPV3 MODULATORS<br/>[FR] MODULATEURS DE TRPV3
申请人:ABBOTT LAB
公开号:WO2012129491A1
公开(公告)日:2012-09-27
Disclosed herein are modulators of TRPV3 of formula (I) wherein X1, X2, R1, R2, Rx, and n are as defined in the specification. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also presented.