Scope and limitations of the dual-gold-catalysed hydrophenoxylation of alkynes
作者:Adrián Gómez-Suárez、Yoshihiro Oonishi、Anthony R Martin、Steven P Nolan
DOI:10.3762/bjoc.12.19
日期:——
able to use highly steric hindered phenols, small changes on the steric bulk of the alkynes have a dramatic effect on the reactivity. More importantly, we have observed that the use of substrates that facilitate the formation of diaurated species such as gem-diaurated or sigma,pi-digold-acetylide species, hinder the catalytic activity. Moreover, we have identified that the use of directing groups in
Gold-Catalyzed Intermolecular Hydrophenoxylation of Unactivated Internal Alkynes
作者:Malleswara Rao Kuram、M. Bhanuchandra、Akhila K. Sahoo
DOI:10.1021/jo1000143
日期:2010.4.2
A general and simple strategy for the synthesis of functionally diverse arylvinyl ethers is reported throughgold-catalyzed intermolecular addition of electronically and sterically substituted phenols with unactivated alkynes. Addition of phenols to unsymmetrical alkynes provides the corresponding mixture of regioisomers with appreciable selectivity. Multiple hydrophenoxylations of polyphenols with