Synthesis of 2-aryl-1,1-difluoro-1,3-enynes via consecutive cross-coupling reactions of 2,2-difluoro-1-iodoethenyl p-toluenesulfonate
作者:Ju Hee Kim、Ye Rim Jeong、Sung Lan Jeon、In Howa Jeong
DOI:10.1016/j.jfluchem.2014.07.007
日期:2014.11
Alkynylation reaction of 2,2-difluoro-1-iodoethenyl p-toluenesulfonate 1 with alkynyltributylstannanes in the presence of 10 mol% Pd(PPh3)4 and 10 mol% CuI in THF at reflux temperature for 3 h provided the corresponding 1,1-difluoro-1,3-enynyl tosylates 2 in 65–85% yields. The further arylation reaction of 2 with aryltributylstannanes in the presence of 10 mol% Pd(PPh3)2Cl2 and 3 equiv. of LiBr in