Cu(I) Catalyst in DMF: An Efficient Catalytic System for the Synthesis of Furans from 2-(1-Alkynyl)-2-alken-1-ones
作者:Nitin T. Patil、Huanyou Wu、Yoshinori Yamamoto
DOI:10.1021/jo050191u
日期:2005.5.1
The cyclization of 2-(1-alkynyl)-2-alken-1-ones 1 proceeded very smoothly in the presence of alcohols 2 with a catalytic amount of Cu(I)Br in DMF at 80 °C, leading to the formation of highlysubstitutedfurans 3. The catalytic system reported herein is easy to handle, compared to the previously known system wherein the reaction between 1 and 2 needed to use moisture sensitive gold(III) chloride.
Nucleophile-assisted Pt-catalyzed cyclization of enynones: an access to synthesis of highly substituted furans
作者:Chang Ho Oh、V. Raghava Reddy、Ahyun Kim、Chul Yun Rhim
DOI:10.1016/j.tetlet.2006.05.119
日期:2006.7
A new and efficient Pt-catalyzed hydroxy- or alkoxy cyclization of 2-(1-alkynyl)-2-alkene-1-ones offers a general synthetic pathway to a wide range of highly substituted furans in good to excellent yields. (c) 2006 Elsevier Ltd. All rights reserved.