The principal product of the nitration of 2-(3-chloro-4-methylbenzoyl) benzoic acid is 2-(3-chloro-4-methyl-6-nitrobenzoyl)benzoic acid, formed in 70--80% yield. In addition, 10-1 5% of 2-(3-chloro-4-methyl-2-nitro-benzoy1)-and 2-(3-chloro-4-methyl-5-nitrobenzoyl) -benzoic acid are formed. This result is in disagreement with a semiquantitative estimate, based on sigma constants, from which 2-(3-chloro-4-methyl-5-nitrobenzoyl)benzoic acid would be the principal reaction product expected. in a study of the nitration of 2-(3-chloro-4-methylbenzoyl) benzoic acid, authentic specimens of 1,4-dichloro-2-methyl-, 1,2-dichloro-3-rnethyl-, and 2.3-dichloro-1 -methyl-derivatives of anthraquinone were prepared.
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