Electron localization in substituted derivatives of poly(aniline)

298-302Aromatic ring substituted and N-substituted derivatives of poly(aniline) have been synthesized. Their electronic spectra, magnetic properties, ESR and electrical conductivity data have been presented and (discussed in terms of electron localization due to substituent in the ring of poly(aniline)

Synthesis and biological activities of new 7-<i style="">o</i>-<img src='/image/spc_char/beta.gif' border=0>-D-glucopyranosyloxy-3-(3-oxo-3-arylprop-1-enyl)-chromones

1548-1557A convenient route to synthesize some new medicinally important 7-hydroxy-3-(3-oxo-3-arylprop-1-enyl)-chromones 2 is described by the interaction of 7-hydroxy-3-formyl chromone 1 with various substituted acetophenones which on condensation with 2,3,4,6-tetra-o-acetyl--D-glucopyranosyl bromide affords 2,3,4,6-tetra-o-acetyl--D-glucopyranosyloxy-3-(3-oxo-3-arylprop-1-enyl)-4H-chromen-4-ones 3. Later on deacetylation with anhydrous zinc acetate in methanol gives 7-o--D-glucopyranosyloxy-3-(3-oxo-3-arylprop-1-enyl)-4H-chromen-4-ones 4. These compounds are evaluated for their in vitro antimicrobial and antioxidant activity. The structures of these newly synthesized compounds are established by IR, NMR, mass spectra, elemental analysis and chemical analysis