N,N-Dimethylpiperidin-4-amine → Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [4-(5-chloro-2-difluoromethoxy-phenyl)-2-(4-dimethylamino-piperidin-1-yl)-thiazol-5-yl]-amide

HRID 529770Notes

Reaction equation

HRID 529770 reaction equation
Br[C:2]1[S:3][C:4]([NH:18][C:19]([C:21]2[CH:22]=[N:23][N:24]3[CH:29]=[CH:28][CH:27]=[N:26][C:25]=23)=[O:20])=[C:5]([C:7]2[CH:12]=[C:11]([Cl:13])[CH:10]=[CH:9][C:8]=2[O:14][CH:15]([F:17])[F:16])[N:6]=1.[CH3:30][N:31]([CH3:38])[CH:32]1[CH2:37][CH2:36][NH:35][CH2:34][CH2:33]1>CC(N(C)C)=O.CO>[Cl:13][C:11]1[CH:10]=[CH:9][C:8]([O:14][CH:15]([F:17])[F:16])=[C:7]([C:5]2[N:6]=[C:2]([N:35]3[CH2:36][CH2:37][CH:32]([N:31]([CH3:38])[CH3:30])[CH2:33][CH2:34]3)[S:3][C:4]=2[NH:18][C:19]([C:21]2[CH:22]=[N:23][N:24]3[CH:29]=[CH:28][CH:27]=[N:26][C:25]=23)=[O:20])[CH:12]=1

Participants

5

Reactant 2

HCID 417391N,N-Dimethylpiperidin-4-amineHCID 118531712Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [2-bromo-4-(5-chloro-2-difluoromethoxy-phenyl)-thiazol-5-yl]-amide

Product 1

HCID 118522465Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [4-(5-chloro-2-difluoromethoxy-phenyl)-2-(4-dimethylamino-piperidin-1-yl)-thiazol-5-yl]-amideYield 39.2%

Reagents, catalysts & solvents 2

HCID 887MethanolSolvent4×HCID 31374DimethylacetamideSolvent

Conditions

Temperature
160 °C

Procedure

Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [2-bromo-4-(5-chloro-2-difluoromethoxy-phenyl)-thiazol-5-yl]-amide (100 mg, 0.2 mmol) and 4-dimethylaminopiperidine (128 mg, 1 mmol) were dissolved in DMA (1 ml) and heated in a microwave at 160° C. for 1 hour. The residue was dissolved in MeOH and loaded onto an SCX-2 cartridge which had been conditioned with MeOH. After flushing with MeOH, the product was eluted with 2M ammonia in MeOH. The resulting yellow glass was purified by MDAP (Method 1). Appropriate fractions were combined and evaporated to afford a yellow solid. The residue was dissolved in MeOH and loaded onto an SCX-2 cartridge which had been conditioned with MeOH. After flushing with MeOH, the product was eluted with 2M ammonia in MeOH to give the title compound as a yellow-orange solid (43 mg, 39%). LCMS (Method 5) [M+H]+=548.1, RT=3.20 min. 1H NMR (400 MHz, DMSO-d6) δ: (ppm) 10.23 (s, 1H), 9.36 (dd, 1H, J=1.6, 7.0 Hz), 8.68 (s, 1H), 8.63 (dd, 1H, J=1.6, 4.2 Hz), 7.66 (d, 1H, J=2.7 Hz), 7.59 (dd, 1H, J=2.6, 8.8 Hz), 7.41 (d, 1H, J=9.0 Hz), 7.31 (dd, 1H, J=4.2, 6.7 Hz), 7.18 (t, 1H, J=73.5 Hz), 3.93 (d, 2H, J=12.7 Hz), 3.02 (dd, 2H, J=10.3, 12.3 Hz), 3.05-2.95 (m, 1H), 2.40-2.26 (m, 6H), 1.92-1.89 (m, 2H), 1.58-1.47 (m, 2H).

Workup

  1. customAfter flushing with MeOH
  2. washthe product was eluted with 2M ammonia in MeOH
  3. customThe resulting yellow glass was purified by MDAP (Method 1)
  4. customevaporated
  5. customto afford a yellow solid
  6. customAfter flushing with MeOH
  7. washthe product was eluted with 2M ammonia in MeOH

Sources & evidence

ORD record
ord-cf795d7269e64837849b2d2410dbb9a4
Source dataset
uspto-grants-2016_05
Patent number
US09346815B2

Reaction notes

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