Hydrochloric Acid → 4-(4-(7-(4-Cyano-3-(trifluoromethyl)phenyl)-8-oxo-6-thioxo-5,7-diazaspiro[3,4]octan-5-yl)phenyl)-N,N-dimethylbutanamide

HRID 240819

Reaction equation

HRID 240819 reaction equation
[CH3:1][N:2]([CH3:21])[C:3](=[O:20])[CH2:4][CH2:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10]([NH:13][C:14]2([C:18]#N)[CH2:17][CH2:16][CH2:15]2)=[CH:9][CH:8]=1.[N:22]([C:25]1[CH:32]=[CH:31][C:28]([C:29]#[N:30])=[C:27]([C:33]([F:36])([F:35])[F:34])[CH:26]=1)=[C:23]=[S:24].C[OH:38].Cl>CN(C=O)C.O>[C:29]([C:28]1[CH:31]=[CH:32][C:25]([N:22]2[C:18](=[O:38])[C:14]3([CH2:17][CH2:16][CH2:15]3)[N:13]([C:10]3[CH:11]=[CH:12][C:7]([CH2:6][CH2:5][CH2:4][C:3]([N:2]([CH3:21])[CH3:1])=[O:20])=[CH:8][CH:9]=3)[C:23]2=[S:24])=[CH:26][C:27]=1[C:33]([F:34])([F:36])[F:35])#[N:30]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 116155404-Isothiocyanato-2-(trifluoromethyl)benzonitrileHCID 66721954N,N-Dimethyl 4-[4-(1-cyanocyclobutylamino)phenyl]butanamide2×

Product 1

HCID 159516264-(4-(7-(4-Cyano-3-(trifluoromethyl)phenyl)-8-oxo-6-thioxo-5,7-diazaspiro[3,4]octan-5-yl)phenyl)-N,N-dimethylbutanamide

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of N,N-Dimethyl 4-[4-(1-cyanocyclobutylamino)phenyl]butanamide (Formula 48) (58 mg, 0.20 mmol) and 4-isothiocyanato-2-trifluoromethyl benzonitrile (74 mg, 0.32 mmol) in DMF (3 mL) was heated under reflux for 2 hours. To this mixture was added methanol (20 mL) and aq. 1 N HCl (5 mL). The second mixture was refluxed for 1.5 h. After being cooled to room temperature, the reaction mixture was poured into cold water (50 mL) and extracted with ethyl acetate (50 mL). The organic layer was dried over MgSO4, concentrated and the residue was purified with silica gel column chromatography (dichloromethane:acetone, 95:5) to give 4-(4-(7-(4-Cyano-3-(trifluoromethyl)phenyl)-8-oxo-6-thioxo-5,7-diazaspiro[3.4]octan-5-yl)phenyl)-N,N-dimethylbutanamide, NC56 (Formula 49) (44 mg, 42%) as a pale yellowish solid. 1H NMR δ 7.98 (s, 1H), 7.97 (d, 1H, J=8.2 Hz), 7.86 (d, 1H, J=8.2 Hz), 7.42 (d, 2H, J=8.3 Hz), 7.22 (d, 2H, J=8.3 Hz), 2.99 (s, 3H), 2.96 (s, 3H), 2.78 (t, 2H, J=7.5 Hz), 2.62-2.70 (m, 2H), 2.52-2.63 (m, 2H), 2.40 (t, 2H, J=7.5 Hz), 2.15-2.30 (m, 1H), 2.04 (p, 2H, J=7.5 Hz), 1.62-1.73 (m, 1H).

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 2 hours
  3. temperatureThe second mixture was refluxed for 1.5 h
  4. extractionextracted with ethyl acetate (50 mL)
  5. dry with materialThe organic layer was dried over MgSO4
  6. concentrationconcentrated
  7. customthe residue was purified with silica gel column chromatography (dichloromethane:acetone, 95:5)

Sources & evidence

ORD record
ord-c982c58467e6497a88a329d72b4a5d5b
Source dataset
uspto-grants-2014_02
Patent number
US08648105B2

Linked notes

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