Trichloroacetyl chloride → 2,2,2-Trichloro-1-{10-[(4-chloro-2-methylphenoxy)acetyl]-10,11-dihydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-3-yl}ethanone

関与物質

反応手順

To a cold (0° C.) solution of 10-[(4-chloro-2-methylphenoxy)acetyl]-10,11-dihydro-5H-pyrrolo[2,1-c][1,4]benzodiazepine of step B (2.70 mmol) and triethylamine (0.76 mL) in dichloromethane (15 mL) was added trichloroacetyl chloride (0.90 mL). This was stirred and allowed to warm to room temperature overnight. The reaction mixture was washed with water (2×), 0.1N hydrochloric acid (2×), dilute aqueous sodium bicarbonate (2×) and finally, with water (1×). The organic phase was dried over anhydrous sodium sulfate and evaporated. The product was purified by crystallization from warm ethyl acetate/hexane (3/1), m.p. 156-158° C. MS [(+)ESI, m/z]: 511 [M+H]+ Anal. Calcd for C23H18Cl4O3: C, 53.93; H, 3.54; N, 5.47. Found: C, 53.90; H, 3.45; N, 5.40.

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