反应详情

From 2′-phthalimidomethylbiphenyl-2-carboxylic acid (precursor 2), after conversion into the acid chloride using thionyl chloride and reaction with benzylamine, 2′-phthalimidomethylbiphenyl-2-carboxylic acid benzylamide was obtained. 1.2 g (2.7 mmol) of the product were dissolved in 55 ml of methanol and treated with 1.35 ml of hydrazine hydrate. After stirring at 40° C. for 1 h, the reaction mixture was concentrated and the residue was taken up in methylene chloride. After filtering off the 2,3-dihydrophthalazine-1,4-dione formed, the mother liquor was concentrated and the residue was purified by flash chromatography using methylene chloride/methanol 30:1. 0.49 g of 2′-aminomethylbiphenyl-2-carboxylic acid benzylamide was obtained.