Efficient access to alkynylated quinalizinones via the gold(<scp>i</scp>)-catalyzed aminoalkynylation of alkynes
作者:Popat S. Shinde、Aslam C. Shaikh、Nitin T. Patil
DOI:10.1039/c6cc03414d
日期:——
Gold-catalyzed aminoalkynylation of alkynes for the synthesis of quinalizinones has been reported. For instance, the reaction of pyridinoalkynes with 1-[(triisopropylsilyl)-ethynyl]-1,2-benziodoxol-3(1H)-one (TIPS-EBX) in the presence of catalytic amount of AuCl at...
An Alternative Approach to Aldol Reactions: Gold-Catalyzed Formation of Boron Enolates from Alkynes
作者:Cindy Körner、Pavel Starkov、Tom D. Sheppard
DOI:10.1021/ja102129c
日期:2010.5.5
A new method for enolate generation via the gold-catalyzed addition of boronic acids to alkynes is reported. The formation of boron enolates from readily accessible ortho-alkynylbenzeneboronic acids proceeds rapidly with 2 mol % PPh(3)AuNTf(2) at ambient temperature. The enolates undergo aldol reaction with an aldehyde present in the reaction mixture to give cyclic boronate esters, which can be subsequently