Trimellitic anhydride → 2-[4-Methoxy-5-(5-phenylbenzoxazol-2-yl)phenyl]-1,3-dioxo-2,3-dihydro-1h-isoindole-5-carboxylic acid

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Reaction Steps

Prepared by the method of Example 15f), from 2-(3-amino-6-methoxyphenyl)-5-phenylbenzoxazole (420 mg, 1.42 mmol) and 1,2,4-benzenetricarboxylic anhydride (273 mg, 1.42 mmol) the title compound was obtained, (460 mg, 66%). 1H NMR (DMSO) δ 13.85(s, 1H), 8.51(dd, 1H), 8.41(s, 1H), 8.29(d, 1H), 8.16(m, 2H), 7.95(d, 1H), 7.81(m, 4H), 7.58(m, 2H), 7.54(d, 1H), 7.48(d, 1H), 4.12(s, 3H). MS 491 m/z (M+H)+.

Provenance & Evidence