1-Hydroxybenzotriazole → Tert-butyl N-[1-[[(4R)-5,6-dihydro-4H-imidazo[1,2-a][1]benzazepin-4-yl]carbamoyl]cyclopropyl]carbamate

HRID 2068555Notes

Reaction equation

HRID 2068555 reaction equation
[CH:1]1[N:5]2[C:6]3[CH:15]=[CH:14][CH:13]=[CH:12][C:7]=3[CH2:8][CH2:9][C@@H:10]([NH2:11])[C:4]2=[N:3][CH:2]=1.[C:16]([O:20][C:21]([NH:23][C:24]1([C:27](O)=[O:28])[CH2:26][CH2:25]1)=[O:22])([CH3:19])([CH3:18])[CH3:17].ON1C2C=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.C(N(C(C)C)CC)(C)C>O1CCCC1.C(OCC)(=O)C>[CH:1]1[N:5]2[C:6]3[CH:15]=[CH:14][CH:13]=[CH:12][C:7]=3[CH2:8][CH2:9][C@@H:10]([NH:11][C:27]([C:24]3([NH:23][C:21](=[O:22])[O:20][C:16]([CH3:18])([CH3:17])[CH3:19])[CH2:26][CH2:25]3)=[O:28])[C:4]2=[N:3][CH:2]=1

Participants

8

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 6883961-((tert-Butoxycarbonyl)amino)cyclopropanecarboxylic acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 58304055(R)-5,6-Dihydro-4H-benzo[F]imidazo[1,2-A]azepin-4-amine

Product 1

HCID 67234396Tert-butyl N-[1-[[(4R)-5,6-dihydro-4H-imidazo[1,2-a][1]benzazepin-4-yl]carbamoyl]cyclopropyl]carbamateYield 79%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Combine (4R)-5,6-dihydro-4H-imidazo[1,2-a][1]benzazepin-4-amine (570 mg, 2.86 mmol), 1-(tert-butoxycarbonylamino)cyclopropanecarboxylic acid (commercially available, 633.19 mg, 3.15 mmol), 1-hydroxybenzotriazole (464 mg, 3.43 mmol), and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (658 mg; 3.43 mmol) in tetrahydrofuran (10 mL). Add diisopropylethylamine (599 μL, 3.43 mmol) and stir the reaction for approximately 16 hours at ambient temperature under nitrogen. Dilute the reaction with ethyl acetate, wash with dilute sodium bicarbonate and brine, dry over sodium sulfate, and concentrate the organic layer under reduced pressure. Purify the residue by flash chromatography (25% EtOAc/hexanes to 85% EtOAc/hexanes) to give the title compound (860 mg, 79%) as a white solid: MS (m/z): 383 (M+1).

Workup

  1. customthe reaction for approximately 16 hours at ambient temperature under nitrogen
  2. additionDilute
  3. washwash with dilute sodium bicarbonate and brine
  4. dry with materialdry over sodium sulfate
  5. concentrationconcentrate the organic layer under reduced pressure
  6. customPurify the residue by flash chromatography (25% EtOAc/hexanes to 85% EtOAc/hexanes)

Sources & evidence

ORD record
ord-f81b889126af49dda6873b0babf6a856
Source dataset
uspto-grants-2012_10
Patent number
US08299061B2

Reaction notes

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