Gold-Catalyzed Efficient Preparation of Linear α-Iodoenones from Propargylic Acetates
作者:Meng Yu、Guozhu Zhang、Liming Zhang
DOI:10.1021/ol070637o
日期:2007.5.1
Au(PPh3)NTf2 is needed to convert readily accessible propargylic acetates into versatile linear alpha-iodoenones in good to excellent yields. This reaction is easy to execute and has broad substrate scope. Good to excellent Z-selectivities are observed in the cases of aliphatic propargylic acetates derived from aldehydes.
Gold-catalyzed efficient preparation of linear α-haloenones from propargylic acetates
作者:Meng Yu、Guozhu Zhang、Liming Zhang
DOI:10.1016/j.tet.2008.11.107
日期:2009.2
Versatile linear α-iodo- and α-bromoenones are prepared efficiently from readily accessible propargylic acetates using 2 mol % of Au(PPh3)NTf2. This reaction is easy to execute and has broad substrate scope. Good to excellent Z-selectivities are observed in the cases of propargylic acetates derived from aliphatic aldehydes.
Alkynylation of Aldehydes and Ketones Using the Bu<sub>4</sub>NOH/H<sub>2</sub>O/DMSO Catalytic Composition: A Wide-Scope Methodology
作者:Elena Yu. Schmidt、Natalia A. Cherimichkina、Ivan A. Bidusenko、Nadezhda I. Protzuk、Boris A. Trofimov
DOI:10.1002/ejoc.201402275
日期:2014.7
Favorsky reaction of a wide range of aldehydes and ketones with alkynes has been implemented under mild conditions (5–20 °C). Using a Bu4NOH/H2O/DMSO catalytic system, propargylic alcohols are formed cleanly in 39–93 % (mostly 72–93 %) yields and with ca. 100 % selectivity. The method is suitable for aliphatic, aromatic, and heteroaromatic aldehydes and ketones, and for aliphatic, aromatic, and functionalized