Intramolecular oxypalladation and cross-coupling of acetylenic alkoxides
摘要:
Stereodefined 2-alkylidenetetrahydrofurans and pyrans were synthesized by treatment of alkyl or aryl acetylenic alcohols with n-BuLi in THF at 0-degrees-C followed by addition of a solution of 10 mol % of Pd(OAc)2 or PdCl2 and PPh3 in THF and 1 equiv of an organic halide.