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Title: Synthesis of benzofuro-4-anilino-2H-1-benzopyran-2-one and benzofuro-pyrano -2H-1-benzopyran-2-one
Authors: Soman, Shubhangi S
Issue Date: Mar-2004
Publisher: NISCAIR-CSIR, India
IPC Code: Int.Cl.7 C 07 D 311/00
Abstract: The title compounds are synthesized from the corresponding 4-hydroxy-benzopyran-2[H]-ones 5a,b .2, 4-Dihydroxyacetophenone 1a,b on condensation with 2-bromocyclohexanone, followed by linear cyclisation and then on reaction with diethyl carbonate in presence of pulverised sodium gives 6, 7, 8, 9-tetrahydro-4-hydroxy-benzofuro [3, 2-g]-2H-1-benzopyran-2-one 5a,b, which on reaction with aniline, followed by dehydrogenation with palladised charcoal gives benzofuro[3, 2-g]-4-anilino-2H-1-benzopyran-2-one 7a,b.5a,b on condensation with benzalacetone followed by dehydrogenation with palladised charcoal furn ishes 2-methyl-4-phenyl-4-hydro-pyran of [3, 2-c]-benzofuro [3, 2-g]-5H-benzopyran-5-one 9a,b.
Page(s): 624-628
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.43B(03) [March 2004]

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