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 secondary amines 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
内部炔丙醇与仲胺和二氧化碳的三组分反应在包含银盐和1,4-二恶烷中的1,8-二氮杂双环[5.4.0]十一碳-7-烯的催化剂体系存在下顺利进行在90℃下加热,可获得高至高收率的相应β-氧代烷基氨基甲酸酯。银盐的抗衡离子对反应影响很小,而有机碱的性质则有显着影响。 胺-氨基甲酸酯-二氧化碳-催化-炔丙醇