Journal of Scientific and Technical Research (Sharda University, Noida)

Dhanashri Panchbhai ¹

Affiliations
1 Department of Chemistry, Anand Niketan College, Warora, Maharashtra, IN

Abstract

The Baker-Venkataramn transformation using NaOH in dimethylsulphoxide (DMSO) 77 have been employed for the coversions of ester (o-aroyloxy/heteroaroyloxyacetophenones) into the corresponding bis β-diketones. A novel class of 2, 8-bis(aryl/heteroaryl) pyrano [3, 2-γ] chromene-4, 6-diones have been synthesized. Bis- β diketones obtained undergoes cyclisation to achieve 2, 8-bis(aryl/heteroaryl) pyrano [3, 2-γ] chromene-4, 6-diones with impressive yields. Reaction mechanism for their formation have been elucidated. 4, 6- Diacetylresorcinol was obtained by the acylation of resorcinol. The structures of these compounds were confirmed by IR, NMR and Mass spectral studies.

Keywords

4, 6-Diacetyl resorcinol, Bis β-diketones, Pyrones, Spectral analysis.

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