Methylamine → 4-[3-(4-Cyano-3-trifluoromethylphenyl)-5,5-dimethyl-4-oxo-2-thioxoimidazolidin-1-yl]-N-methylbenzamide

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Reaction Steps

A mixture of 4-[3-(4-cyano-3-trifluoromethylphenyl)-5,5 -dimethyl-4-oxo-2-thioxo-imidazolidin-1-yl]benzoic acid methyl ester (49c) (0.02 g, 0.0435 mmol) and methylamine (2 ml distilled from its 40% aqueous solution) was kept at −20° C. for 15 hours. After evaporation of the methylamine, the mixture was chromatographed (dichloromethane:acetone, 80:20) to yield 4-[3-(4-cyano-3-trifluoromethylphenyl)-5,5-dimethyl-4-oxo-2-thioxo-imidazolidin-1-yl]-N-methylbenzamide (49d) [RD153](0.01 g, 0.0224, 51%), the structure of which is illustrated in Formula 20. The ester 4-[3-(4-cyano-3-trifluoromethylphenyl)-5,5-dimethyl-4-oxo-2-thioxo-imidazolidin -1-yl]benzoic acid methyl ester (49c) (0.08 g, 0.0179 mmol, 41%) was also recovered.

Provenance & Evidence