Sodium hydride → (5,11-Dihydro-pyrido[2,3-b][1,5]benzodiazepin-6-yl)-[2-trifluoromethyl-4-(3-trifluoromethyl-pyrazol-1-yl)-phenyl]-methanone

関与物質

反応手順

Sodium hydride (60% suspension in oil, 0.17 g, 4.25 mmol) was washed with hexane, dried under nitrogen and resuspended in dry dimethylformamide (10 mL). 3-trifluoromethyl pyrazole (0.34 g, 2.5 mmol ) was added in one portion. After the gas evolution subsided stirring was continued at room temperature. The (5,11-dihydro-pyrido [2,3-b][1,5]benzodiazepin-6-yl)- (4-fluoro-2-trifluoromethyl-phenyl)methanone of Example 4, Step B (0.75 g, 1.94 mmol) was added in one portion and the mixture was placed in an oil bath (preheated at 130° C.) overnight. After cooling, the mixture was partitioned between water and ethyl acetate. The organic extracts were dried over sodium sulfate, and evaporated to dryness in vacuo. The residue was crystallized from ethanol to yield the title compound (0.57 g, 57.3%) as an off-white solid, m.p. 127-129° C.

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