5-Ethyl-1,2-oxazol-3-amine → N-(5-ethyl-1,2-oxazol-3-yl)-1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxamide

HRID 1748346Notes

Reaction equation

HRID 1748346 reaction equation
[O:1]=[C:2]1[C:8]2=[CH:9][C:10]3[CH:11]=[CH:12][C:13]([C:16]([OH:18])=O)=[CH:14][C:15]=3[N:7]2[CH2:6][CH2:5][CH2:4][NH:3]1.CN(C([O:26][N:27]1N=N[C:29]2[CH:30]=[CH:31][CH:32]=[N:33][C:28]1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N=P1N(C)CCCN1C)(C)(C)C.C(C1ON=C(N)C=1)C>C1COCC1.CN(C=O)C>[CH2:31]([C:30]1[O:26][N:27]=[C:28]([NH:33][C:16]([C:13]2[CH:12]=[CH:11][C:10]3[CH:9]=[C:8]4[C:2](=[O:1])[NH:3][CH2:4][CH2:5][CH2:6][N:7]4[C:15]=3[CH:14]=2)=[O:18])[CH:29]=1)[CH3:32]

Participants

7

Reactant 4

HCID 50943815-Ethyl-1,2-oxazol-3-amineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 672357061-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylic acid2×HCID 178480484HCID 178480484, compound

Product 1

HCID 68323382N-(5-ethyl-1,2-oxazol-3-yl)-1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxamideYield 5%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 1-oxo-2,3,4,5-tetrahydro-1H-[1,4]diazepino[1,2-a]indole-8-carboxylic acid (Intermediate J, 75 mg, 0.31 mmol) in THF (2 mL) and DMF (0.5 mL) is added HATU (128 mg, 0.34 mmol). The mixture is stirred at room temperature for 1 h, after which polystyrene bound 2-tert-butylimino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (419 mg, 0.92 mmol) is added. The mixture is stirred at room temperature for 10 min and 5-ethyl-3-aminoisoxazole (103 mg, 0.92 mmol) is added. The reaction is stirred at 60° C. for 16 h and is then cooled to room temperature. The mixture is filtered, washing with methanol and the filtrate is concentrated under reduced pressure. The residue is purified via preparative HPLC using a gradient elution from 10-90% acetonitrile/water with 0.1% TFA to obtain the title compound (5 mg, 5%). LCMS: 339.20 (M+H+). (System V1)

Workup

  1. additionis added
  2. stirringThe mixture is stirred at room temperature for 10 min
  3. stirringThe reaction is stirred at 60° C. for 16 h
  4. temperatureis then cooled to room temperature
  5. filtrationThe mixture is filtered
  6. washwashing with methanol
  7. concentrationthe filtrate is concentrated under reduced pressure
  8. customThe residue is purified via preparative HPLC
  9. washa gradient elution from 10-90% acetonitrile/water with 0.1% TFA

Sources & evidence

ORD record
ord-e26dde735a28448a805e7175d4243b87
Source dataset
uspto-grants-2015_10
Patent number
US09150577B2

Reaction notes

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