1-Hydroxybenzotriazole → 2-[3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]-N-{1-[3-(trifluoromethyl)phenyl]ethyl}acetamide

HRID 660922Notes

Reaction equation

HRID 660922 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]([CH:13]3[CH2:15][CH2:14]3)[C:11](=[O:16])[N:10]([CH2:17][C:18]([OH:20])=O)[N:9]=2)=[CH:4][CH:3]=1.[F:21][C:22]([F:33])([F:32])[C:23]1[CH:24]=[C:25]([CH:29]([NH2:31])[CH3:30])[CH:26]=[CH:27][CH:28]=1.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.Cl>CN(C)C=O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[N:12]([CH:13]3[CH2:15][CH2:14]3)[C:11](=[O:16])[N:10]([CH2:17][C:18]([NH:31][CH:29]([C:25]3[CH:26]=[CH:27][CH:28]=[C:23]([C:22]([F:21])([F:32])[F:33])[CH:24]=3)[CH3:30])=[O:20])[N:9]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 2782448(1R)-1-(3-(Trifluoromethyl)phenyl)ethylamineHCID 42632357[3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]acetic acid

Product 1

HCID 580120762-[3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]-N-{1-[3-(trifluoromethyl)phenyl]ethyl}acetamide

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

2000.0 mg (6.809 mmol) of [3-(4-chlorophenyl)-4-cyclopropyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl]-acetic acid from Example 88A and 1417.0 mg (7.490 mmol) of 1-[3-(trifluoromethyl)phenyl]-ethanamine are placed in 10 ml of dimethylformamide and treated with 1104.0 mg (8.171 mmol) of HOBt. After 10 mins' stirring, 1697.0 mg (8.852 mmol) of EDC hydrochloride are added and the mixture is stirred overnight at room temperature. For the workup, the reaction mixture is partitioned between dichloromethane and water, and the organic phase is separated, dried over sodium sulphate and concentrated. The residue is purified by flash chromatography on silica gel (eluent: dichloromethane/methanol first 200:1, then 100:1). A subsequent enantiomer separation by preparative HPLC on chiral phase [Method 14] yields 1460 mg (46% of theory) of the enantiomerically pure target compound (see also Example 81).

Workup

  1. stirringthe mixture is stirred overnight at room temperature
  2. customFor the workup, the reaction mixture is partitioned between dichloromethane and water
  3. customthe organic phase is separated
  4. dry with materialdried over sodium sulphate
  5. concentrationconcentrated
  6. customThe residue is purified by flash chromatography on silica gel (eluent
  7. customA subsequent enantiomer separation by preparative HPLC on chiral phase [Method 14]
  8. customyields 1460 mg (46% of theory) of the enantiomerically pure target compound (

Sources & evidence

ORD record
ord-12e593c691634b4f84485c4fde54a8c7
Source dataset
uspto-grants-2011_12
Patent number
US08084481B2

Reaction notes

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