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Diisopropylethylamine → (S)-3-(5-chloroindole-2-carbonylamino)-2,3-dihydro-1,5-benzoxazepin-4(5H)-one

HRID 11591
Notes
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Reaction equation

HRID 11591 reaction equation
Cl.[NH2:2][C@@H:3]1[C:9](=[O:10])[NH:8][C:7]2[CH:11]=[CH:12][CH:13]=[CH:14][C:6]=2[O:5][CH2:4]1.[Cl:15][C:16]1[CH:17]=[C:18]2[C:22](=[CH:23][CH:24]=1)[NH:21][C:20]([C:25](O)=[O:26])=[CH:19]2.ON1C2N=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.C(N(C(C)C)CC)(C)C>O1CCCC1>[Cl:15][C:16]1[CH:17]=[C:18]2[C:22](=[CH:23][CH:24]=1)[NH:21][C:20]([C:25]([NH:2][C@@H:3]1[C:9](=[O:10])[NH:8][C:7]3[CH:11]=[CH:12][CH:13]=[CH:14][C:6]=3[O:5][CH2:4]1)=[O:26])=[CH:19]2
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 5

HCID 81531DiisopropylethylamineHCID 826935-Chloro-1H-indole-2-carboxylic acidHCID 181649HOAtHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 18599716(S)-7-Amino-6,7-dihydro-9H-5-oxa-9-aza-benzocyclohepten-8-one hydrochloride

Product 1

HCID 11688973
(S)-3-(5-chloroindole-2-carbonylamino)-2,3-dihydro-1,5-benzoxazepin-4(5H)-one
Yield 88.8%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Alternatively, to a mixture of (S)-3-amino-2,3-dihydro-1,5-benzoxazepin-4(5H)-one hydrochloride salt (54 mg) (prepared in Itoh, et al., Chem. Pharm. Bull. 1986, 34, 1128–1147), tetrahydrofuran (10 mL), 5-chloroindole-2-carboxylic acid (39 mg), 1-hydroxy-7-azabenzotriazole (31 mg), and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (57 mg) stirring at room temperature under argon was added diisopropylethylamine (65 mg). The resulting yellow suspension was stirred for 30 min, during which a solution formed. After evaporation under vacuum, the residue was redissolved in ethyl acetate (50 mL) and the resulting solution was washed sequentially with 1.0 M aqueous hydrochloric acid (25 mL), 1.0 M aqueous sodium hydroxide (25 mL), water (25 mL) and brine (25 mL), dried over anhydrous sodium sulfate, and evaporated under vacuum. The resulting solid crude product was triturated with diethyl ether (20 mL three times), followed by drying under vacuum to provide the title compound (63 mg).

Workup

  1. stirringThe resulting yellow suspension was stirred for 30 min, during which a solution
  2. customformed
  3. customAfter evaporation under vacuum
  4. dissolutionthe residue was redissolved in ethyl acetate (50 mL)
  5. washthe resulting solution was washed sequentially with 1.0 M aqueous hydrochloric acid (25 mL), 1.0 M aqueous sodium hydroxide (25 mL), water (25 mL) and brine (25 mL)
  6. dry with materialdried over anhydrous sodium sulfate
  7. customevaporated under vacuum
  8. customThe resulting solid crude product was triturated with diethyl ether (20 mL three times)
  9. customby drying under vacuum

Sources & evidence

ORD record
ord-d639b90ca6dd451282aa8ebb8b743be1
Source dataset
uspto-grants-2006_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07098235B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes