Oxidative acetylation of tetramethyl bisphenol-F (2) using two different reagents is described. The reaction of (2) with NaIO 4 in acetic anhydride furnished a novel triacetate (3) and its reaction with lead tetraacetate (LTA) in dry benzene resulted in the formation of a novel bis-cyclohexadienone (4).

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Polyphenylalkane derivatives Q 0720Oxidative Acetylation of Tetramethyl Bisphenol-F. -Reaction of bisphenol-F (III) with NaIO4, in Ac2O affords the novel triacetate (V) while its reaction with Pb(O-Ac)4 in benzene yields the novel bis-cyclohexadienone (VII). -(DEOTA*, P. T.; PARMAR, H. S.; VALODKAR, V. B.; UPADHYAY, P. R.; SAHOO, S. P.; Synth.

Pesticide deposits post-treatment and before diffusing inside the plants are exposed to sunlight. Many of them degrade into a variety of photo products that may be harmful to living beings through accidental ingestion. The addition of ultraviolet light absorbers to the pesticide formulations is an attractive strategy to prevent photodegradation of the pesticides. Water-soluble quaternary ammonium ultraviolet light absorbers (QAUVAs) were synthesized from 2,4-dihydroxy benzophenones (BP-1) and their structures were confirmed by 1H NMR, 13C NMR, UV, and FTIR. A cost-saving approach for the photoprotection of disulfoton insecticide using these QAUVAs is presented. All the four QAUVAs exhibit excellent UV screening effect. The insesticide disulfoton was recovered in much higher amounts (22.27 ~ 25.64% higher than control) when it was irradiated in the presence of QAUVAs in comparison with the amount of recovery of pesticide exposed in absence of them.