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 1927384Notes

Reaction equation

HRID 1927384 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, RD169 (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-1faf0a50912c4a1fab7acd3e6ce83e17
Source dataset
uspto-grants-2012_05
Patent number
US08183274B2

Reaction notes

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