O. Shablykin, Daniil Merzhyievsky, O. Shablykina
Dec 30, 2017
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Abstract
In the study of the interaction of homophthalic anhydride and methyl (triphenylphosphoranylidene)acetate, along with ( 1-oxo-1 H -isochromen-3‑yl )acetate obtaining, two minor products – (1,3-dioxo-1,2,3,4-tetrahydronaphthalene-2-yl)acetate and 2‑((1‑oxo-1 H -isochromen-3-yl)methyl)benzoic acid – had been isolated. The action of tert ‑butyl (triphenylphosphoranylidene)acetate on homophthalic anhydride didn’t lead to Wittig reaction; the encumbered ylide demonstrated only its basicity, and products of homophthalic anhydride self-condensation – 2‑((1‑oxo-1 H -isochromen-3-yl)methyl)-benzoic acid and 12-hydroxy-5 H -dibenzo[ c , g ]chromen-5-one – were formed.