Elsevier

Mendeleev Communications

Volume 31, Issue 2, March–April 2021, Pages 246-247
Mendeleev Communications

Different addition modes of cyclopentadiene and furan at methylidene(thio)hydantoins

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3-Methylidene-5-phenylhydantoin and 3-methylidene-5-phenylthiohydantoin react with cyclopentadiene forming spirocyclic Diels–Alder adducts. In contrast, their reactions with furan in the presence of AlCl3 give the products of the furan α-amidoalkylation.

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