Sodium hydride → 3(R,S)-[(Benzyloxycarbonyl)amino]-5-cyclohexyl-1,3-dihydro-1-propyl-2H-1,4-benzodiazepin-2-one

HRID 1490111Notes

Reaction equation

HRID 1490111 reaction equation
[CH:1]1([C:7]2[C:13]3[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=3[NH:11][C:10](=[O:18])[CH:9]([NH:19][C:20]([O:22][CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)=[O:21])[N:8]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[H-].[Na+].I[CH2:33][CH2:34][CH3:35]>>[CH:1]1([C:7]2[C:13]3[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=3[N:11]([CH2:33][CH2:34][CH3:35])[C:10](=[O:18])[CH:9]([NH:19][C:20]([O:22][CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=3)=[O:21])[N:8]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

4

Reactant 3

HCID 24758Sodium hydrideHCID 336431-IodopropaneHCID 135413400Z-(R,S)-3-amino-5-cyclohexyl-2-oxo-1,4-benzodiazepine

Product 1

HCID 214804833(R,S)-[(Benzyloxycarbonyl)amino]-5-cyclohexyl-1,3-dihydro-1-propyl-2H-1,4-benzodiazepin-2-one

Procedure

A solution of 5-cyclohexyl-1,3-dihydro-3(R,S)-[(benzyl oxycarbonyl)amino]-2H-1,4-benzodiazepin-2-one (Intemediate 1, step 2, 2 g) in anhydrous dimethylfomamide (15 ml), under an atmosphere of nitrogen, was treated with sodium hydride (0.22 g of a 55-60% dispersion in mineral oil), at 0° C. After 45 min at 0° C., 1-iodopropane (0.55 ml) was added in one portion and the solution allowed to reach ambient temperature and stirred overnight. After this time the solvent was removed under reduced pressure, and the crude residue partitioned between water (25 ml) and dichloromethane (25 ml). The organic phase was separated and the aqueous phase extracted with dichloromethane (3×25 ml). The combined organic layers were washed with brine (50 ml), dried (MgSO4) and evaporated in vacuo. The residue was triturated with diethyl ether to give the title compound (1.74 g) as a solid. mp 160°-163° C.; 1H NMR (360 MHz, CDCl3)δ0.82 (3H, t, J=10.5 Hz), 0.94-1.48 (5H, m), 1.50-1.76 (5H, m), 1.79-1.90 (1H, m), 1.96-2,08 (1H, m), 2.70-2,84 (1H, m), 3.46-3.59 (1H, m), 4.22-4.35 (1H, m), 5.06-5.16 (3H, m), 5.07 (1H, d, J=12.0 Hz), 7.21-7.40 (7H, m), 7.44-7.59 (2H, m).

Workup

  1. customto reach ambient temperature
  2. customAfter this time the solvent was removed under reduced pressure
  3. customthe crude residue partitioned between water (25 ml) and dichloromethane (25 ml)
  4. customThe organic phase was separated
  5. extractionthe aqueous phase extracted with dichloromethane (3×25 ml)
  6. washThe combined organic layers were washed with brine (50 ml)
  7. dry with materialdried (MgSO4)
  8. customevaporated in vacuo
  9. customThe residue was triturated with diethyl ether

Sources & evidence

ORD record
ord-d412ebebab6e4ab3a4e3674e71f8a7a5
Source dataset
uspto-grants-1997_10
Patent number
US05681833

Reaction notes

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