Synthesis of 2- and 6-Thienylazulenes by Palladium-Catalyzed Direct Arylation of 2- and 6-Haloazulenes with Thiophene Derivatives.
2016
Preparation of 2- and 6-thienylazulene derivatives was established by the palladium-catalyzed direct cross-coupling reaction of 2- and 6-haloazulenes with the corresponding thiophene derivatives in good yield. Several thienylazulene derivatives were also used in the reaction with 2-chloroazulene derivatives in the presence of the palladium-catalyst to afford the thiophene derivatives with two azulene functions in good yield.
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