Reaction of diazoindenothiophenes with mono- and dibenzoylacetylenes
S. Mataka, T. Ohshima, M. Tashiro
Sep 21, 1982
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Journal
Journal of Heterocyclic Chemistry
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Key Takeaway Key Takeaway: Diazoindenothiophenes can react with benzoyl acetylene to produce rearrangement products and butadiene derivatives, with pyrazole 12 being the major product in the reaction of 1 with dibenzoylacetylene.
Abstract
Reaction of diazoindenothiophenes (1 and 2) with benzoyl acetylene (4) afforded the rearrangement products (6a and b) of the initial adducts. The major product of the reaction of diazo indenothiophene (3) with 4 was butadiene derivative 8a. Reaction of 1 with dibenzoylacetylene (5a) gave the rearranged pyrazole (12), while the reaction of 2 and 3, afforded the butadiene derivatives (8b-d).
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