4-Methyl-3-nitroaniline → N-(4-Methyl-3-nitrophenyl)-3-(trifluoromethyl)benzamide

Beteiligte Stoffe

Reaktionsschritte

To a solution of 4-methyl-3-nitroaniline (5 g, 32.2 mmol, 1.0 eq.) and triethylamine (5.38 ml, 38.6 mmol, 1.2 eq.) in dichloromethane (100 ml) is added a solution of 3-trifluoromethylbenzoyl chloride 33.8 mmol, 1.05 eq.) within 30 min. The suspension formed is stirred for 1 h at room temperature. Then, the reaction mixture is diluted with dichloromethane (800 ml) and extracted with water (100 ml), 2M aqueous Na2CO3 (100 ml), 2M HCl (100 ml), water (100 ml). The organic layer is dried over Na2SO4, evaporated to a volume of about 100 ml and diluted with hexanes (100 ml). The precipitate is filtered off, washed with hexanes/dichloromethane 1:1 and hexanes. Vacuum drying over night at room temperatures gives light yellow fine needles: HPLC: tR=6.72 min (purity: >99%, gradient A), ESI-MS: 325.2 [MH]+

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