反应详情

温度

65 °C

To a solution of sulfone 2 (1.27 g, 3.78 mmol) in 15 mL of 1-methyl-2-pyrrolidinone was added trans-1,4-diaminocyclohexane (3.75 g, 32.8 mmol). The reaction mixture was stirred at 65° C. for 1.5 hours, cooled, and diluted with 80 mL of ethyl acetate. The resulting suspension was filtered and washed several times with ethyl acetate and methanol. The solid was dried to yield 1.31 g (94%) of 2-(trans-4-aminocyclohexylamino)-6-(2-chlorophenyl)-pyrido[2,3-d]pyrimidin-7-ol as an off-white powder (mass spec. M+H+=370). The free base was taken up in ethyl acetate and treated with a 1M solution of HCl/Et2O to form the dihydrochloride salt of the title compound as a white powder with a melting point of >300° C.

1. temperaturecooled
2. filtrationThe resulting suspension was filtered
3. washwashed several times with ethyl acetate and methanol
4. customThe solid was dried