Hydrochloric Acid → 5-Cyano-4-ethylamino-2-{4-[N-(2-hydroxy-3-piperidinopropyl)sulphamoyl]anilino}pyrimidine

Participants

Reaction Conditions

Reaction Steps

4-[N-(2-Hydroxy-3-piperidinopropyl)sulphamoyl]aniline (Method 118; 200 mg, 0.64 mmol) was dissolved in methanol (4 ml). 1M Ethereal hydrogen chloride (1.28 ml, 1.28 mmol) was added and the mixture gently warmed to give a solution. The volatiles were partially evaporated to give a volume of approx. 1.5 ml. 2-Butanol (5 ml) was added and the cloudy solution warmed to 50° C. 2-Chloro-5-cyano-4-ethylaminopyrimidine (Method 56; 233 mg, 1.28 mmol) was added in portions and the reaction was then heated at 95° C. for 20 hours. The hot supernatant was decanted from the solid residue and the solution allowed to cool. The resulting precipitate was collected by filtration, washed with diethyl ether and suspended in water (approx. 35 ml). The suspension was adjusted to pH>10 with 2M aqueous sodium hydroxide solution and extracted with ethyl acetate (3×15 ml). The extracts were dried, the volatiles evaporated and the residue purified by chromatography on silica eluting with DCM/methanolic ammonia (100:0) increasing in polarity to (85:15). The product was triturated with diethyl ether and collected by filtration to give the title compound (30 mg, 10%). NMR: 1.15 (t, 3H), 1.35 (m, 2H), 1.43 (m, 4H), 2.10-2.35 (m, 6H), 2.68 (m, 1H), 2.83 (m, 1H), 3.48 (quin, 2H), 3.56 (m, 1H), 4.59 (s, 1H) 7.36 (brt, 1H), 7.70 (d, 2H), 7.88 (t, 1H), 7.95 (d, 2H), 8.40 (s, 1H) 10.16 (s, 1H); m/z: 460.

Provenance & Evidence