Cyclohexanone → (R)-(-)-2-oxo-3-tert-butoxycarbonylamino-5-cyclohexyl-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine

HRID 352375Notes

Reaction equation

[O:1]=[C:2]1[NH:8][C:7]2[CH:9]=[CH:10][CH:11]=[CH:12][C:6]=2[NH:5][CH2:4][CH:3]1[NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15].[C:21]1(=O)[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]1>C(O)(=O)C.[C].[Pd]>[O:1]=[C:2]1[NH:8][C:7]2[CH:9]=[CH:10][CH:11]=[CH:12][C:6]=2[N:5]([CH:21]2[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]2)[CH2:4][C@H:3]1[NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15]

Participants

Conditions

Temperature: 52.5 °C

Procedure

In 1.2 g of acetic acid were dissolved 1.39 g of 2-oxo-3-tert-butoxycarbonylamino-1,3,4,5-tetrahydro-2H-1,5-benzodiazepine and 3.9 g of cyclohexanone. To the resulting solution was added 302 mg of 10% palladium carbon. Under a hydrogen pressure of 10 kg/cm2, the mixture was stirred at 50 to 55° C. for 12 hours. After the reaction mixture was cooled to room temperature, the reaction mixture was filtered through Celite. Water was added to the filtrate and crystals so precipitated were collected by filtration with suction. The resulting crystals were recrystallized from a mixed solvent of ethanol and water, whereby 1.63 g of the title compound was obtained.

Workup

temperatureAfter the reaction mixture was cooled to room temperature
filtrationthe reaction mixture was filtered through Celite
additionWater was added to the filtrate and crystals
customso precipitated
filtrationwere collected by filtration with suction
customThe resulting crystals were recrystallized from a mixed solvent of ethanol and water

Sources & evidence

ORD record: ord-c0af054623e5427b990146935d0c2a8e
Source dataset: uspto-grants-2004_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06747022B2

Reaction notes

Loading…