Efficient Synthesis of β-Oxoalkyl Carbamates from Carbon Dioxide, Internal Propargylic Alcohols, and Secondary Amines Catalyzed by Silver Salts and DBU
作者:Huanfeng Jiang、Chaorong Qi、Liangbin Huang
DOI:10.1055/s-0029-1218675
日期:2010.5
The three-component reaction of internal propargylic alcohols with secondaryamines and carbon dioxide proceeded smoothly in the presence of a catalyst system comprising a silver salt and 1,8-diazabicyclo[5.4.0]undec-7-ene in 1,4-dioxane at 90 ˚C to give the corresponding β-oxoalkyl carbamates in good to high yields. The counterion of the silver salt had little effect on the reaction whereas the nature