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Triethylamine → N-[2,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-2-oxo-1H-1,4-benzodiazepin-3-yl]-1H-2-indolecarboxamide

HRID 862410
Notes
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Reaction equation

HRID 862410 reaction equation
[NH2:1][CH:2]1[N:8]=[C:7]([C:9]2[C:14]([O:15][CH3:16])=[CH:13][C:12]([CH3:17])=[CH:11][C:10]=2[O:18][CH3:19])[C:6]2[CH:20]=[CH:21][CH:22]=[CH:23][C:5]=2[N:4]([CH3:24])[C:3]1=[O:25].F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1.[NH:53]1[C:61]2[C:56](=[CH:57][CH:58]=[CH:59][CH:60]=2)[CH:55]=[C:54]1[C:62](O)=[O:63].C(N(CC)CC)C>CN(C)C=O.O>[CH3:19][O:18][C:10]1[CH:11]=[C:12]([CH3:17])[CH:13]=[C:14]([O:15][CH3:16])[C:9]=1[C:7]1[C:6]2[CH:20]=[CH:21][CH:22]=[CH:23][C:5]=2[N:4]([CH3:24])[C:3](=[O:25])[CH:2]([NH:1][C:62]([C:54]2[NH:53][C:61]3[C:56]([CH:55]=2)=[CH:57][CH:58]=[CH:59][CH:60]=3)=[O:63])[N:8]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 72899Indole-2-carboxylic acidHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 153796223-Amino-1,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-1,4-benzodiazepin-2-one

Product 1

HCID 9805268
N-[2,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-2-oxo-1H-1,4-benzodiazepin-3-yl]-1H-2-indolecarboxamide
Yield 81%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of 0.38 g of the laevorotatory enantiomer of 3-amino-1,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-1,4-benzodiazepin-2-one in 10 ml of dimethylformamide, cooled to 5° C., are added 0.52 g of BOP and 0.19 g of indole-2-carboxylic acid, followed by 0.23 ml of triethylamine. The reaction mixture is stirred overnight at room temperature and is then poured into water and extracted with ethyl acetate, dried over sodium sulphate and evaporated to dryness. The product is purified by chromatography on a column of silica gel (eluent: dichlormethane/methanol: 95/5). The fractions of pure product are evaporated to dryness and the residue is crystallized from isopropyl ether. White crystals of (-)-N-[2,3-dihydro-5-(2,6-dimethoxy-4-methylphenyl)-1-methyl-2-oxo-1H-1,4-benzodiazepin-3-yl]-1H-indol-2-carboxamide are obtained, melting at 135° C.; Yield=81%; [α]D20 =-408 (c=0.35 in 1N HCl/CH3OH--50/50).

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialdried over sodium sulphate
  3. customevaporated to dryness
  4. customThe product is purified by chromatography on a column of silica gel (eluent: dichlormethane/methanol: 95/5)
  5. customThe fractions of pure product are evaporated to dryness
  6. customthe residue is crystallized from isopropyl ether

Sources & evidence

ORD record
ord-52b2dc4710314cbf9c925368682182a9
Source dataset
uspto-grants-1998_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05719143

Reaction notes

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