A New and Improved Synthesis of trans-1,2-Diiodoalkenes and Their Stereospecific and Highly Regioselective Trifluoromethylation
摘要:
Reaction of terminal alkynes with iodine in the presence of CuI (5%) in acetonitrile under reflux for several hours gave the trans-1,2-diiodoalkenes in high yields. The trifluoromethylation of these diiodides using FSO2CF2CO2Me/CuI/DMF proceeded in excellent yields in a stereospecific and highly regioselective manner.