反应详情

1.46 g of 9,10-dimethoxy-6,7-dihydro-2-chloro-4H-pyrimido(6,1-a)-isoquinolin-4-one are added to a mixture of 1.0 g of sodium hydroxide and 50.0 ml of n-butanol. The reduction mixture is refluxed for 6 hours. The solent is removed under reduced pressure. The residue is treated with water and extracted with chloroform. The extract is dried over anhydrous Na2SO4 and evaporated to give a white solid. After crystallization from a chloroform-ether mixture, 0.7 g of the title compound is obtained, m.p. 158°-159° C.

1. temperatureThe reduction mixture is refluxed for 6 hours
2. customThe solent is removed under reduced pressure
3. additionThe residue is treated with water
4. extractionextracted with chloroform
5. dry with materialThe extract is dried over anhydrous Na2SO4
6. customevaporated
7. customto give a white solid
8. customAfter crystallization from a chloroform-ether mixture