反应详情

To a solution of 11-cyclopropyl-5,11-dihydro-4-methyl-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one (1.0 g) in tetrahydrofuran (25 m L) was added NaH (80% in oil, 0.12 g). The mixture was stirred at room temperature for 30 min. and then cooled to -78° C. Lithium diisopropylamide (1.5 M in cyclohexane, 6.6 mL) was added and the mixture was stirred for an additional 45 min. Benzaldehyde (0.53 g) was added, the mixture was stirred at -65° C. for 1 hour and then allowed to warm to room temperature. The reaction was quenched with water and the volatile materials were removed under reduced pressure. The residue was dissolved in ethyl acetate, washed with water, dried, filtered, and evaporated. The residue was chromatographed over silica gel with 40% ethyl acetate/hexane, and then purified by preparative layer chromatography to give 0.1 g of the title compound, m.p. 195°-197° C.

1. temperaturecooled to -78° C
2. stirringthe mixture was stirred for an additional 45 min
3. stirringthe mixture was stirred at -65° C. for 1 hour
4. temperatureto warm to room temperature
5. customThe reaction was quenched with water
6. customthe volatile materials were removed under reduced pressure
7. dissolutionThe residue was dissolved in ethyl acetate
8. washwashed with water
9. customdried
10. filtrationfiltered
11. customevaporated
12. customThe residue was chromatographed over silica gel with 40% ethyl acetate/hexane
13. custompurified by preparative layer chromatography