Synthesis of functionalized chromones via …

Synthesis of chromones - ResearchGate

28/08/2017 · Synthesis of chromon..

1, 5-Benzothazepinyl chromones were synthesized starting from 2, 4-diacyl phenol. The 2, 4-diacyl phenol was condensed with aryl aldehydes to obtain bis-chalcones1a-d. The bis-chalcones on cyclocondensation with equimolar amount of 2-aminothiophenol gave 1, 5-benzothiazepinyl chalcones2a-d. The chalcones on oxidative cyclisation in DMSO – I2 yielded the titled compounds3a-d. The microbial evaluation of the representative 1, 5-benzothiazepinyl chromones has also been performed.

SYNTHESIS OF CHROMONES AND THEIR APPLICATIONS during …

Synthesis of 2-(2-Phenylethyl)chromones | Shashi …

N2 - An efficient and versatile method for the synthesis of flavones hydroxylated in either ring A or B and of chromones hydroxylated in ring A is described. This approach is based on the acidic resin-promoted cyclodehydration and simultaneous deprotection of methoxymethoxylated 1-(2-hydroxyphenyl)propane-1,3-diones easily available by either the Baker-Venkataraman rearrangement or the Claisen condensation.

SYNTHESIS AND ANTIMICROBIAL EVALUATION OF CHROMONES BEARING 1, 5-BENZO THIAZEPINYL MOIETY Abstract

AB - An efficient and versatile method for the synthesis of flavones hydroxylated in either ring A or B and of chromones hydroxylated in ring A is described. This approach is based on the acidic resin-promoted cyclodehydration and simultaneous deprotection of methoxymethoxylated 1-(2-hydroxyphenyl)propane-1,3-diones easily available by either the Baker-Venkataraman rearrangement or the Claisen condensation.