Improvement of the Friedel–Crafts benzoylation by using bismuth trifluoromethanesulfonate in 1-butyl-3-methylimidazolium trifluoromethanesulfonate ionic liquid under microwave irradiation
作者:Phuong Hoang Tran、Ngoc Bich Le Do、Thach Ngoc Le
DOI:10.1016/j.tetlet.2013.10.155
日期:2014.1
Bismuth trifluoromethanesulfonate (bismuthtriflate) catalyzed the Friedel–Crafts benzoylation of activated aromatic compounds when dissolved in 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM]OTf) ionicliquid. Immobilization of bismuthtriflate (5 mol %) in [BMIM]OTf allowed the synthesis of aryl ketones in good to excellent yields with short reaction times under microwave irradiation
Erbium trifluoromethanesulfonate catalyzed Friedel–Crafts acylation using aromatic carboxylic acids as acylating agents under monomode-microwave irradiation
作者:Phuong Hoang Tran、Poul Erik Hansen、Hai Truong Nguyen、Thach Ngoc Le
DOI:10.1016/j.tetlet.2014.12.038
日期:2015.1
Erbium trifluoromethanesulfonate is found to be a good catalyst for the Friedel–Craftsacylation of arenes containing electron-donating substituents using aromatic carboxylicacids as the acylating agents under microwave irradiation. An effective, rapid and waste-free method allows the preparation of a wide range of aryl ketones in good yields and in short reaction times with minimum amounts of waste