A Simple, One-Pot Synthesis of 1-Alkoxy-1-alkynes and 1-Alkoxy-1-alkyn-3-ols
作者:Wayne M. Stalick、Robert N. Hazlett、Robert E. Morris
DOI:10.1055/s-1988-27545
日期:——
The title compounds are prepared by a high yield, one-pot reaction using readily available chloroacetaldehyde dialkyl acetals as starting materials. The reaction is initiated by sodium amide and the intermediate acetylide anion thus produced, reacts readily with a variety of electrophiles such as alkyl halides, carbonyl compounds or water to produce the desired products.
Contemporaneous Dual Catalysis: Chemoselective Cross-Coupling of Catalytic Vanadium–Allenoate and π-Allylpalladium Intermediates
作者:Barry M. Trost、Xinjun Luan、Yan Miller
DOI:10.1021/ja204817y
日期:2011.8.17
This paper presents a detailed investigation of a dual catalytic system that combines a vanadium-catalyzed Meyer-Schuster rearrangement and a palladium-catalyzedallylicalkylation. The implementation of this novel reaction relies on matching the formation rates of vanadium-allenoate and π-allylpalladium intermediates with their bimolecular coupling rate in order to minimize the undesired protonation