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温度

0 °C

Oxalyl chloride (0.31 g) was added dropwise to a stirred mixture of 2-methyl-5-nitrobenzoic acid (0.4 g), DMF (a few drops) and methylene chloride (25 ml) which had been cooled to 0° C. The mixture was allowed to warm to ambient temperature and was stirred for five hours. The mixture was evaporated to give 2-methyl-5-nitrobenzoyl chloride which was dissolved in methylene chloride (10 ml) and added dropwise to a stirred mixture of 3-(4-methylpiperazin-1-ylmethyl)aniline (0.44 g), triethylamine (0.49 g) and methylene chloride (10 ml). The mixture was stirred at ambient temperature for 16 hours. The mixture was washed with a saturated aqueous sodium bicarbonate solution. The organic phase was evaporated and the residue was purified by column chromatography on an isolute SCX ion exchange column using initially methanol and then a 99:1 mixture of methanol and a saturated aqueous ammonium hydroxide solution as eluent. There was thus obtained N-[3-(4-methylpiperazin-1-ylmethyl)phenyl]-2-methyl-5-nitrobenzamide(0.46 g); Mass Spectrum: M+H+ 369.

1. temperatureto warm to ambient temperature
2. customThe mixture was evaporated