Active methylene compounds in a very effective approach to 3-substituted isobenzofuranones through tandem aldol/lactonization reactions
In this article we describe a new accessible methodology for the synthesis of isobenzofuran-1(3H)-ones. In this process we exploited an effective, economic, useful and environmentally benign K2CO3 catalyzed, solvent-free one-pot tandem aldol-lactonization reaction between active methylene compounds and methyl 2-carboxy benzaldehyde. A particularly simple work-up and purification procedure are additional advantages addressed to a general green chemistry approach to this important class of heterocyclic compounds.
Di Mola, Antonia,Croce, Gianluca,More, Vijaykumar,De Caprariis, Paolo,Filosa, Rosanna,Massa, Antonio
experimental part
p. 6146 - 6151
(2012/09/07)
A New Procedure for Regiospecific Syntheses of Benzopyran-1-ones
A new, general route to benzopyran-1-ones 33 from phthalaldehydic acids 27 and nitroalkanes 28 is described.The sequence permits strightforward variation of both the 3-substituent and the pattern of functionalization on the aromatic ring of the benzopyran
Hauser, Frank M.,Baghdanov, Vaceli M.
p. 4676 - 4681
(2007/10/02)
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