Methyl iodide → 5-[6-[(4-tert-Butylphenyl)sulfonyl]-2-(trifluoromethyl)-6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-8-yl]-3-methyl-1,3,4-oxadiazol-2(3H)-one

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Reaction Steps

To a solution of 5-[6-[(4-tert-butylphenyl)sulfonyl]-2-(trifluoromethyl)-6,11-dihydro-5H-pyrido[2,3-b][1,5]benzodiazepin-8-yl]-1,3,4-oxadiazol-2(3H)-one (Example 441, 10 mg, 0.0183 mmol) in DMF (0.10 mL) was added cesium carbonate (6 mg, 0.0183 mmol) and iodomethane (0.0011 mL, 0.0183 mmol). After stirring at rt for 1.5 h, the reaction mixture was quenched with water, and the product was extracted with EtOAc (3×). The combined extracts were washed with water and brine, dried (MgSO4) and concentrated. The residue was purified via SiO2 chromatography, to provide the title compound. LC/MS: m/e 560.0 (M+H)+. 1H NMR (500 MHz, CDCl3): δ 8.09 (1H, d, J=2.0 Hz), 7,69 (1H, dd, J=8.5, 2.1 Hz), 7.61 (1H, d, J=7.5 Hz), 7.10-7.20 (3H, m), 6.94-6.98 (3H, m), 6.83 (1H, d, J=8.7 Hz), 4.65-4.95 (2H, br), 3.53 (3H, s), 1.25 (9H, s).

Provenance & Evidence