反应详情

28 mg (0.7 mmole) of 60% by weight NaH in mineral oil was suspended in dry tetrahydrofuran (5 ml) under a N2 atmosphere, followed by the addition of n-butanol (0.6 mmole). Then, 2-chloro-[(N-3-methyl-phenylcarbamoyl)-piperazin-1-yl]-6-(3,4-dimethoxyphenyl)-pyrido[3,2-d]pyrimidine (149 mg, 0.29 mmole) was added. The mixture was heated at reflux under N2 for 2.5 hours and then diluted with water. The crude product was extracted four times from the reaction mixture with ethyl acetate. The organic extracts were combined, dried over MgSO4 and evaporated to dryness under reduced pressure. Preparative thin layer chromatography on silica using a n-hexane/ethyl acetate 1:4 mixture as eluent afforded the pure title compound (148 mg, yield 93%) which was characterized by its mass spectrum as follows: MS (m/z): 557 ([M+H]+, 100).

1. temperatureThe mixture was heated
2. temperatureat reflux under N2 for 2.5 hours
3. extractionThe crude product was extracted four times from the reaction mixture with ethyl acetate
4. dry with materialdried over MgSO4
5. customevaporated to dryness under reduced pressure