Catalytic Asymmetric Friedel-Crafts Reaction of Activated Phenols and 4-Oxo-4-arylbutenoates
作者:Sha Bai、Xiaohua Liu、Zhen Wang、Weidi Cao、Lili Lin、Xiaoming Feng
DOI:10.1002/adsc.201200341
日期:2012.8.13
A highly enantioselective Friedel–Crafts reaction of activated phenols with (E)-4-oxo-4-arylbutenoates has been developed with the N,N′-dioxide-scandium(III) complex as the catalyst. A variety of (E)-4-oxo-4-arylbutenoates were found to be suitable substrates for the reaction. The desired products were obtained in moderate to high yields (up to 98%) and excellent enantioselectivities (up to 97% ee)
以N,N'-二氧化物-scan (III)络合物为催化剂,研究了活化酚与(E)-4-氧代-4-芳基丁烯酸酯的高度对映选择性的Friedel-Crafts反应。发现各种(E)-4-氧代-4-芳基丁烯酸酯是适合该反应的底物。以中等至高产率(高达98%)和优异的对映选择性(高达97%ee)获得所需产物。