Unexpected migration of a benzoyl group in the intramolecular Wittig reaction of o-acyloxybenzylidenephosphoranes with benzoyl chlorides: One-pot synthesis of isomeric 3-benzoyl-2-phenylbenzofurans
Michela BegalaFirst
;Giovanna Lucia DeloguLast
2020-01-01
Abstract
The reaction of o-acyloxybenzylidenetriphenylphosphoranes with substituted benzoyl chlorides in an aprotic solvent led, together with the expected 2-phenylbenzofuran, to isomeric 3-benzoyl-2-phenylbenzofuran derivatives. This result formally corresponds to intramolecular migration of the benzoyl group from the ortho oxygen atom to the ylide carbanion via cyclization and ring opening of the starting o-acyloxybenzylidenetriphenylphosphoranes.File | Size | Format | |
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Tetrahedron Letters 61 (2020) 151634.pdf open access
Type: versione editoriale
Size 1.69 MB
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1.69 MB | Adobe PDF | View/Open |
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