<i>tert</i>-Butyl Sulfoxide as a Starting Point for the Synthesis of Sulfinyl Containing Compounds
作者:Juhong Wei、Zhihua Sun
DOI:10.1021/acs.orglett.5b02743
日期:2015.11.6
Sulfoxides bearing a tert-butyl group can be activated using N-bromosuccinimide (NBS) under acidic conditions and then subsequently treated with a variety of nitrogen, carbon, or oxygen nucleophiles to afford a wide range of the corresponding sulfinic acid amides, new sulfoxides, and sulfinic acid esters.
Divergent Method to <i>trans</i>-5-Hydroxy-6-alkynyl/alkenyl-2-piperidinones: Syntheses of (−)-Epiquinamide and (+)-Swainsonine
作者:Chang-Mei Si、Zhuo-Ya Mao、Han-Qing Dong、Zhen-Ting Du、Bang-Guo Wei、Guo-Qiang Lin
DOI:10.1021/acs.joc.5b00803
日期:2015.6.5
An efficient diastereoselective approach to access trans-5-hydroxy-6-alkynyl/alkenyl-2-piperidinones has been developed through nucleophilic addition of α-chiral aldimines using alkynyl/alkenyl Grignardreagents. The diastereoselectivity of alkenyl in C-6 position of 2-piperidinone was controlled by α-alkoxy substitution, while the alkynyl was controlled by the coordination of the α-alkoxy substitution
Metal-Catalyzed Oxidation and Epoxidation of α-Hydroxy Vinyl and Dienyl Sulfoxides
作者:Roberto Fernández de la Pradilla、Alejandro Castellanos、Jorge Fernández、Milagros Lorenzo、Pilar Manzano、Paloma Méndez、Julián Priego、Alma Viso
DOI:10.1021/jo052244d
日期:2006.2.1
Treatment of acyclic α-hydroxyalkyl α,β-unsaturated sulfoxides with t-BuOOH/VO(acac)2 results in rapid oxidation to the unsaturated sulfones followed by an unusual regio- and stereoselective epoxidation at the unsaturated sulfones; this methodology has been applied to the preparation of carbohydrate-like fragments.