A Cu-catalyzed allyl−aryl coupling reaction between (Z)-acyclic or cyclicallylicphosphates and arylboronates proceeds with excellent γ-E-selectivity and 1,3-anti chirality transfer, which gives the corresponding coupling products with benzylic and allylic stereogenic centers. The wide availability and easy-to-handle nature of arylboronates, the inexpensiveness of the Cu catalyst system, and the high
Cu-Catalyzed Silylation of Alkynes: A Traceless 2-Pyridylsulfonyl Controller Allows Access to Either Regioisomer on Demand
作者:Alfonso García-Rubia、Jose A. Romero-Revilla、Pablo Mauleón、Ramón Gómez Arrayás、Juan C. Carretero
DOI:10.1021/jacs.5b02667
日期:2015.6.3
of the reaction, opening the access to either regioisomer without modification of the starting substrate by virtue of an in situ base-promoted alkyne to allene equilibration which takes place prior to the silylcupration process. Furthermore, removal of the directing SO2Py allows for further elaboration of the silylation products. In particular, a one-pot tandem alkyne silylation/allylic substitution