- Regioselective cyclodehydration of ortho-hydroxy acetyl aryloxyketones to benzofuran
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(Chemical Equation Presented) ortho-Hydroxy acetyl benzofuran derivatives have been synthesized in a regioselective cyclodehydration of aryloxyketones obtained from β-resacetophenone and α-halo ketones.
- Patel, Jagdish M.,Soman, Shubhangi S.
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p. 945 - 949
(2008/03/29)
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- Synthesis of benzofuro-4-anilino-2H-1-benzopyran-2-one and benzofuro-pyrano -2H-1-benzopyran-2-one
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The title compounds are synthesized from the corresponding 4-hydroxy-benzopyran-2[H]-ones 5a,b .2, 4-Dihydroxy-acetophenone 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 furnishes 2-methyl-4-phenyl-4-hydro-pyrano[3, 2-c]-benzofuro[3, 2-g]-SH-benzopyran-5-one 9a,b.
- Soman, Shubhangi S.
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p. 624 - 628
(2007/10/03)
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- A Facile Synthesis of 4-Cinnamoyl-dibenzofurans
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A facile synthesis of 4-cinnamoyldibenzofuran derivatives has been achieved by condensation of 2-bromocyclohexanone with hydroxyacetophenons, ring closure with alkali followed by condensation with benzaldehyde and subsequent dehydrogenation with DDQ.
- Ahluwalia, V. K.,Adhikari, R.,Singh, R. P.
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p. 274 - 276
(2007/10/02)
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