Triethylamine → N-(3-{[tert-butyl(dimethyl)silyl]oxy}propyl)-2-chloro-5-fluoro-4-pyrimidinamine

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Reaction Steps

To a solution of t-butyldimethylsilyl chloride (1.63 g, 10.70 mmol) in dichloromethane (48.63 mL) was added 3-[(2-chloro-5-fluoro-4-pyrimidinyl)amino]-1-propanol (Example 80, 2.0 g, 9.73 mmol), followed by triethylamine (1.49 mL, 10.70 mmol) and dimethylaminopyridine (0.02 g, 0.19 mmol). The resulting cloudy mixture was stirred at rt for 18 h and then diluted with dichloromethane (80 mL). The mixture was washed with water (50 mL), dried over magnesium sulfate, and concentrated. The product was purified by column chromatography (67% hexanes in EtOAc) to give the title compound as a white solid (2.68 g, 86%). 1H NMR (300 MHz, CD2Cl2) δ 7.78 (d, 1H), 3.64-3.59 (m, 2H), 3.44-3.41(m, 2H), 1.82-1.73 (m, 2H), 0.84 (s, 9H), 0.001 (s, 6H).

Provenance & Evidence