5-Chloro-2-[2-(phenylmethyl)hydrazinyl]benzoic acid → HCID 19805485, compound

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Reaction Steps

A suspension of 2-(2-benzylhydrazino)-5-chlorobenzoic acid (2.5 g) in acetic acid (20 ml) was heated under reflux for 30 minutes. The solution was then cooled and diluted with ether. The solid which formed was recrystallised from ethanol to give 1,2-dihydro-2-benzyl-5-chloro-3H-indazol-3-one as a solid (1.6 g), m.p. 215-225° C. (dec.).

Provenance & Evidence