A Formal (4 + 2) Cycloaddition of Phosphorus Ylides: Synthesis of Aromatic and Heteroaromatic 1,2-Diesters and Diones.
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DOI: 10.1021/acs.orglett.2c01234
Abstract: Heteroarylmethylenephosphorus ylides underwent Michael addition with alkynediones and alkynediesters, followed by intramolecular cyclization and elimination of triphenylphosphine oxide to afford 1,2-diaroylbenzenes and 1,2-alkoxycarbonylcarbo- and heterocycles. The analogous (4 + 2) cycloaddition led to the formation… read more here.
Keywords: phosphorus ylides; ylides synthesis; cycloaddition phosphorus; formal cycloaddition ... See more keywords