Synthesis 2020; 52(16): 2387-2394
DOI: 10.1055/s-0039-1690895
paper
© Georg Thieme Verlag Stuttgart · New York

Regiospecific Palladium-Catalyzed Cross-Coupling Reactions Using the Operational Equivalent of 1,3-Dilithiopropyne

Escuela de Química, Universidad de Costa Rica, San José, 11501-2060, Costa Rica   Email: jorge.cabezas@ucr.ac.cr
,
Natasha Ferllini
› Author Affiliations
We thank the University of Costa Rica and Vicerrectoría de Investigación for financial support.
Further Information

Publication History

Received: 05 March 2020

Accepted after revision: 26 March 2020

Publication Date:
07 April 2020 (online)


Abstract

A regiospecific palladium-catalyzed cross-coupling reaction using the operational equivalent of the dianion 1,3-dilithiopropyne, with aromatic iodides is reported. This reaction gives high yields of 1-propyn-1-yl-benzenes and 2-(propyn-1-yl)thiophenes in the presence of catalytic amounts of palladium(0) or (II) and stoichiometric amounts of copper iodide. No terminal alkyne or allene isomers were detected. Reaction conditions were very mild and several functional groups were tolerated.

Supporting Information