Hydrochloric Acid → HCID 57794553, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of N-(3-chloro-2-fluorophenyl)-6-methoxy-7-({1-[(2R)-2-(methylamino)propanoyl]piperidin-4-yl}oxy)quinazolin-4-amine (0.5 g, 1.03 mmol (Example 10), paraformaldehyde (0.3 g, 10.0 mmol) and anhydrous magnesium sulfate (0.25 g, 2.08 mmol) in methanol (5 ml) was treated with 4M hydrogen chloride in dioxane (257 μl, 1.03 mmol). Sodium cyanoborohydride (0.26 g, 4.12 mmol) was added and the mixture heated to 40° C. for 3 hours. The reaction mixture was then partitioned between saturated aqueous sodium hydrogen carbonate and ethyl acetate. The organics were washed with brine, dried over sodium sulfate, filtered and evaporated. The residue was purified by column chromatography eluting with dichloromethane/7N ammonia in methanol (96/4). Fractions containing the desired product were evaporated to give a gum which was triturated with diethyl ether/isohexane (1:1) to give the title product as a white powder (0.415 g, 80.7%); 1H NMR Spectrum: (DMSO d6 +CD3CO2D) 1.18-1.25 (m, 3H), 1.52-1.80 (m, 2H), 1.95-2.15 (m, 2H), 2.48 (s, 6H), 3.18-3.54 (m, 2H), 3.73-3.91 (m, 1.5H), 3.92 (s, 3H), 4.00-4.14 (m, 1.5H), 4.83-4.95 (m, 1H), 7.21-7.29 (m, 1H), 7.35 (s, 1H), 7.41-7.55 (m, 2H), 7.80 (s, 1H), 8.35 (s, 1H); Mass Spectrum: (M+H)+ 502.

Provenance & Evidence