The first highly efficient double Friedel–Crafts reaction of N-tosyl imines with anisole, phenol, thioanisole and analogues has been developed to produce the corresponding symmetric diarylmethanes and triarylmethanes with high regioselectivity in the presence of a catalytic amount of Bi2(SO4)3–TMSCl at room temperature.
首次开发了一种高效的N-
甲苯磺
酰亚胺与
茴香醚、
苯酚、
硫代
茴香醚及其类似物的双弗里德尔-克拉夫茨反应,在室温下,使用催化量的Bi2(SO4)3-TMSCl,以高区域选择性制备相应的对称二芳基
甲烷和三芳基
甲烷。