A Method for the Net Contra-thermodynamic Isomerization of Cyclic Trisubstituted Alkenes
作者:Raphaël F. Guignard、Laurent Petit、Samir Z. Zard
DOI:10.1021/ol4018744
日期:2013.8.16
A simple sequence for the net contra-thermodynamic isomerization of cyclic trisubstituted alkenes is reported consisting of a radical addition of p-chlorothiophenol, followed by oxidation to the sulfoxide and thermal syn-elimination to give the least substituted isomeric cycloalkene.
Stabilization of Radicals by Imides. A Modular Stereoselective Approach to Protected Functional 1,2-Diamines
作者:Songzhe Han、Samir Z. Zard
DOI:10.1021/ol502599r
日期:2014.10.17
Radical addition of various xanthates to N,N'-diacylimidazol-2-one occurs readily to give protected 1,2-diamines. The imide group stabilizes the adduct radical sufficiently to enable a second addition to unactivated alkenes. In some cases, the addition product could be converted into an indoline, a tetralone, or further added to an indole. Regioselective removal of one acyl group could also be accomplished.
A radical-based approach to hydroxytetralones from unprotected phenols
作者:Laurent Petit、Samir Z. Zard
DOI:10.1039/c0cc00680g
日期:——
Xanthates derived from unprotected 2-hydroxyacetophenones undergo smooth intermolecular addition to unactivated alkenes and subsequent cyclisation to give hydroxytetralones in good yield.