Reactivity Switch Enabled by Counterion: Highly Chemoselective Dimerization and Hydration of Terminal Alkynes
作者:Caixia Xu、Weiyuan Du、Yi Zeng、Bin Dai、Hao Guo
DOI:10.1021/ol403684a
日期:2014.2.7
A counterion-controlled reactivity tuning in Pd-catalyzed highly chemoselective and regioselective dimerization and hydration of terminalalkynes is reported. The use of acetate as counterion favors the formation of an alkenyl alkynyl palladium intermediate which forms hitherto less reported 1,3-diaryl-substituted conjugated enynes after reductive elimination. Using chloride, which is a better leaving
Phosphinito palladium(<scp>ii</scp>) complexes as catalysts for the synthesis of 1,3-enynes, aromatic alkynes and ynones
作者:R. E. Islas、J. Cárdenas、R. Gaviño、E. García-Ríos、L. Lomas-Romero、J. A. Morales-Serna
DOI:10.1039/c6ra28855c
日期:——
catalyst in the formation of C–C bonds. The coupling of terminalalkynes formed gem-1,3-enynes as the only reaction products. Aromatic alkynes can be synthesized from the coupling of terminalalkynes and haloaromatic compounds (Sonogashira coupling). The phosphinito palladium(II) complex also catalyses the coupling between acyl chlorides and terminalalkynes (Sonogashira coupling), furnishing ynones in excellent