Partial Hydrogenation of Alkynes to <i>cis</i>‐Olefins by Using a Novel Pd⁰–Polyethyleneimine Catalyst

Abstract

Partial hydrogenation: Various mono- and disubstituted alkynes were partially hydrogenated to give cis-olefins with high selectivity using a 5 % Pd0–polyethyleneimine complex as a catalyst without additives (see scheme).