Enantioselective domino reaction of CO2, amines and allyl chlorides under iridium catalysis: formation of allyl carbamates
作者:Min Zhang、Xiaoming Zhao、Shengcai Zheng
DOI:10.1039/c4cc00413b
日期:——
The enantioselective domino reaction between CO2 (1 atm), amines and linear allyl chlorides in the presence of an iridium complex, DABCO and toluene at 15 degrees C was realized, which gave branchedallylcarbamates in acceptable to high yields with up to excellent regioselectivity (99/1) and 94% ee. This is the first example of the synthesis of chiral allylcarbamates through catalytic domino reactions
Enantioselective Transformation of Allyl Carbonates into Branched Allyl Carbamates by Using Amines and Recycling CO<sub>2</sub>under Iridium Catalysis
作者:Sheng-Cai Zheng、Min Zhang、Xiao-Ming Zhao
DOI:10.1002/chem.201402388
日期:2014.6.10
Enantioselectivetransformation of allylcarbonates into branchedallylcarbamates by usingamines and recycling CO2 in the presence of an Ir complex and K3PO4 was accomplished. This provided branchedallylcarbamates in fair to excellent yields with up to 98:2 regioselectivity and 93 % ee. The role of CO2 in this transformation is discussed as well.
通过使用胺并在Ir络合物和K 3 PO 4的存在下再循环CO 2,实现了碳酸烯丙酯的对映选择性转化为支链的烯丙基氨基甲酸酯。这提供了分支烯丙基氨基甲酸酯相当的优良收率,区域选择性高达98:2,ee达93%。还讨论了CO 2在该转化中的作用。