Semireduction of Alkynes Using Formic Acid with Reusable Pd-Catalysts.
Riku IwasakiEikichi TanakaToshinari IchihashiYasushi IdemotoKohei EndoPublished in: The Journal of organic chemistry (2018)
The treatment of PdCl2 with K2CO3 and HCO2H in dioxane gives black precipitates, which are an effective catalyst for the semireduction of alkynes to alkenes using formic acid as a reductant. Even 0.05 mol % Pd promoted the reduction reaction of tolane in high yield with high selectivity.