反应详情

(1R*,2R*,4S*)-N2-(tert-Butoxycarbonyl)-N1-[(5-chloroindol-2-yl)carbonyl]-4-ethoxycarbonyl-1,2-cyclohexanediamine (735 mg) was dissolved in dichloromethane (10 ml), a 1N hexane solution (5 ml) of isobutyllithium hydride was added at −78° C., and the mixture was stirred for 3 hours and then 30 minutes at 0° C. A saturated aqueous solution of ammonium chloride was added at −78° C., the mixture was extracted with dichloromethane, and the resultant organic layer was washed with a saturated aqueous solution of sodium bicarbonate and saturated saline and then dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified by column chromatography on silica gel (dichloromethane:methanol=19:1) to obtain the title compound (480 mg) as a colorless solid.

1. custom30 minutes
2. customat 0° C
3. extractionthe mixture was extracted with dichloromethane
4. washthe resultant organic layer was washed with a saturated aqueous solution of sodium bicarbonate and saturated saline
5. dry with materialdried over anhydrous magnesium sulfate
6. distillationThe solvent was distilled off under reduced pressure
7. customthe residue was purified by column chromatography on silica gel (dichloromethane:methanol=19:1)