反应详情

2-(1-cyclohexyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethanamine (695 mg) was dissolved in methylene chloride (12 mL), and titanium tetraisopropoxide (1.1 mL) and 1-cyclohexene-1-carboaldehyde (309 mg) were added thereto, followed by stirring at room temperature for 3 hours. Thereafter, the solvent was evaporated, and MeOH (15 mL) and then sodium cyanotrihydroborate (190 mg) were added to the mixture, followed by stirring for 14 hours. The solvent was evaporated, and water and EtOAc were added to the mixture. The mixture was filtered through celite and extracted with EtOAc. The extract was washed with saturated brine and then dried over magnesium sulfate. The solvent was evaporated and the resulting residue was purified by silica gel column chromatography (chloroform-MeOH) to obtain N-(cyclohexa-1-en-1-ylmethyl)-2-(1-cyclohexyl-3,4-dihydroisoquinolin-2(1H)-yl)-2-oxoethanamine (585 mg).

1. customThereafter, the solvent was evaporated
2. additionMeOH (15 mL) and then sodium cyanotrihydroborate (190 mg) were added to the mixture
3. stirringby stirring for 14 hours
4. customThe solvent was evaporated
5. additionwater and EtOAc were added to the mixture
6. filtrationThe mixture was filtered through celite
7. extractionextracted with EtOAc
8. washThe extract was washed with saturated brine
9. dry with materialdried over magnesium sulfate
10. customThe solvent was evaporated
11. customthe resulting residue was purified by silica gel column chromatography (chloroform-MeOH)