ChemInform Abstract: Convenient Synthesis of 2‐Alkynylbenzazoles Through Sonogashira Cross‐Coupling Reaction Between Thioethers and Terminal Alkynes.

Abstract

Convenient Synthesis of 2-Alkynylbenzazoles Through Sonogashira Cross--Coupling Reaction Between Thioethers and Terminal Alkynes. -The coupling reaction proceeds under aerobic conditions with aromatic and aliphatic alkynes to give 2-alkynyl substituted benzoxazoles and benzothiazoles. Furthermore, optimized conditions are developed for the desulfinative cross-coupling reaction of 2-mercaptobenzthiazoles (VIII) and benzoxazole (IX). -(PAUN, A.; MATACHE, M.; ENACHE, F.; NICOLAU, I.; PARASCHIVESCU, C. C.; IONITA, P.; ZARAFU, I.; PARVULESCU*, V. I.; GUILLAUMET, G.; Tetrahedron Lett. 56 (2015) 39, 5349-5352, http://dx.doi.org/10.1016/j.tetlet.2015.08.001 ; Fac. Chem., Univ. Bucharest, RO-050663 Bucharest, Rom.; Eng.) -Mais 03-126