An efficient one-pot synthesis of trifluoromethyl-substituted cyclobutene derivatives

摘要

Reaction between 1,1,1-trifluorobutane-2,4-dione derivatives and electron-deficient ethyl phenylpropyolate in the presence of triphenylphosphine leads to 4-acyl-2-phenyl-3-trifluoromethylcyclobut-2-ene-1-carboxylate derivatives in good yields.