Gold(III)‐Catalyzed Intermolecular Oxidation‐Cyclization of Ynones: Access to 4‐Substituted Chroman‐3‐ones
作者:Jian Li、Fang Yang、Yang‐Ting Ma、Kegong Ji
DOI:10.1002/adsc.201900260
日期:2019.4.23
A synthesis of 4‐substituted chroman‐3‐one derivatives has been developed through a gold(III) catalyzed oxidation‐cyclization of ynones in good to excellent yield using easily prepared substrates. A broad range of synthetically useful functional groups (halide, alkene, alkyne, phenolic hydroxyl) were tolerated. Further application of this method paves a new way to prepare the skeleton of oblarotenoids
The Cinchona Primary Amine-Catalyzed Asymmetric Epoxidation and Hydroperoxidation of α,β-Unsaturated Carbonyl Compounds with Hydrogen Peroxide
作者:Olga Lifchits、Manuel Mahlau、Corinna M. Reisinger、Anna Lee、Christophe Farès、Iakov Polyak、Gopinadhanpillai Gopakumar、Walter Thiel、Benjamin List
DOI:10.1021/ja402058v
日期:2013.5.1
Using cinchona alkaloid-derived primary amines as catalysts and aqueous hydrogenperoxide as the oxidant, we have developed highly enantioselective Weitz-Scheffer-type epoxidation and hydroperoxidation reactions of α,β-unsaturated carbonylcompounds (up to 99.5:0.5 er). In this article, we present our full studies on this family of reactions, employing acyclic enones, 5-15-membered cyclic enones, and
Copper-Catalyzed Propargylic Reduction with Diisobutylaluminum Hydride
作者:Yuna Kim、Hanseul Lee、Sunga Park、Yunmi Lee
DOI:10.1021/acs.orglett.8b02413
日期:2018.9.7
A mild and efficient method for the synthesis of allenes through selective copper-catalyzed hydride addition to propargylic chlorides using commercially available diisobutylaluminum hydride has been developed. This transformation, which is promoted by a readily accessible N-heterocyclic carbene–copper complex, provides a wide range of new and versatile functionalized allenes in good to excellent yields
[EN] PREPARATION OF [ALPHA]-SULFENYLATED CARBONYL COMPOUNDS FROM PROPARGYLIC ALCOHOLS IN ONE STEP<br/>[FR] PRÉPARATION DE COMPOSÉS [ALPHA]-SULFÉNYLÉS CARBONYLE À PARTIR D'ALCOOLS PROPARGYLIQUES EN UNE SEULE ÉTAPE
申请人:KAT2BIZ AB
公开号:WO2013112104A1
公开(公告)日:2013-08-01
The present relates to a method and a kit to produce an optically pure α-sulfenylated carbonyl compound comprising a primary or a secondary propargylic alcohol and an aryl thiol, a transition metal catalyst and a solvent.
An aqueous and recyclable copper(i)-catalyzed route to α-sulfenylated carbonyl compounds from propargylic alcohols and aryl thiols
作者:Rahul A. Watile、Srijit Biswas、Joseph S. M. Samec
DOI:10.1039/c3gc41251b
日期:——
A highly efficient one-step copper(I)-catalyzed method for the synthesis of α-sulfenylated carbonyl compounds frompropargylicalcohols and aryl thiols in aqueous media is described. A variety of α-sulfenylated carbonyl compounds can be synthesized in good to excellent yields. The catalyst has been successfully recycled up to 4 times without any loss of activity in an aqueous medium.