Benzaldehyde → (3aR*,10aS*)-9-[4-(Benzylamino)benzyl]-4-(phthalimidoacetyl)-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta[e][1,4]diazepin-10(1H)-one

HRID 361580Notes

Reaction equation

HRID 361580 reaction equation
[NH2:1][C:2]1[CH:37]=[CH:36][C:5]([CH2:6][N:7]2[C:13](=[O:14])[C@H:12]3[CH2:15][CH2:16][CH2:17][C@H:11]3[N:10]([C:18](=[O:31])[CH2:19][N:20]3[C:24](=[O:25])[C:23]4=[CH:26][CH:27]=[CH:28][CH:29]=[C:22]4[C:21]3=[O:30])[C:9]3[CH:32]=[CH:33][CH:34]=[CH:35][C:8]2=3)=[CH:4][CH:3]=1.[CH:38](=O)[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1.CC1C(Br)=C(O)C(Br)=CC=1C1(C2C=C(Br)C(O)=C(Br)C=2C)OS(=O)(=O)C2C=CC=CC1=2.C([BH3-])#N.[Na+].Cl.CO>C(Cl)(Cl)Cl.O.CO>[CH2:38]([NH:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:6][N:7]2[C:13](=[O:14])[C@H:12]3[CH2:15][CH2:16][CH2:17][C@H:11]3[N:10]([C:18](=[O:31])[CH2:19][N:20]3[C:21](=[O:30])[C:22]4=[CH:29][CH:28]=[CH:27][CH:26]=[C:23]4[C:24]3=[O:25])[C:9]3[CH:32]=[CH:33][CH:34]=[CH:35][C:8]2=3)=[CH:36][CH:37]=1)[C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1

Participants

9

Reactant 5

HCID 240BenzaldehydeHCID 6451Bromocresol GreenHCID 5003444Sodium cyanoborohydrideHCID 21893726Hydrochloride methanolHCID 54523300(3aR*,10aS*)-9-(4-aminobenzyl)-4-(phthalimidoacetyl)-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta[e][l,4]diazepin-10(1H)-one

Product 1

HCID 54536426(3aR*,10aS*)-9-[4-(Benzylamino)benzyl]-4-(phthalimidoacetyl)-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta[e][1,4]diazepin-10(1H)-oneYield 70%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 6212ChloroformSolvent

Procedure

To a suspension of (3aR*,10aS*)-9-(4-aminobenzyl)-4-(phthalimidoacetyl)-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta[e][1,4]diazepin-10(1H)-one (198 mg, 0.4 mmol) in chloroform (2 mL)-methanol (2 mL) was added benzaldehyde (49 μL, 0.48 mmol) and the mixture was stirred at room temperature for 40 minutes. To the resulting solution was added bromocresol green as well as sodium cyanoborohydride (30 mg, 0.48 mmol). Then, 10% HCl/methanol was added dropwise until the color of the mixture had ceased to change. This reaction mixture was stirred at room temperature for 15 minutes, at the end of which time it was diluted with water and extracted with 3 portions of chloroform. The pooled organic layer was washed with water, dried over MgSO4, filtered, and concentrated under reduced pressure. The residue was crystallized from ethanol to provide 163 mg (Yield 70%) of the title compound. m.p. 178°-182° C.

Workup

  1. stirringThis reaction mixture was stirred at room temperature for 15 minutes, at the end of which time it
  2. extractionextracted with 3 portions of chloroform
  3. washThe pooled organic layer was washed with water
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was crystallized from ethanol

Sources & evidence

ORD record
ord-9125524adaf045f4b992bb9ca259d07f
Source dataset
uspto-grants-1999_02
Patent number
US05866567

Reaction notes

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