Cesium carbonate → N-[3-[5-chloro-2-(difluoromethoxy)phenyl]-1-[2-(1,4-dioxa-8-azaspiro[4,5]decan-8-yl)-2-oxo-ethyl]pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide

HRID 529762Notes

Reaction equation

HRID 529762 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:25][CH:26]([F:28])[F:27])=[C:6]([C:8]2[C:12]([NH:13][C:14]([C:16]3[CH:17]=[N:18][N:19]4[CH:24]=[CH:23][CH:22]=[N:21][C:20]=34)=[O:15])=[CH:11][NH:10][N:9]=2)[CH:7]=1.Cl[CH2:30][C:31]([N:33]1[CH2:42][CH2:41][C:36]2([O:40][CH2:39][CH2:38][O:37]2)[CH2:35][CH2:34]1)=[O:32].C([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C.O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:25][CH:26]([F:28])[F:27])=[C:6]([C:8]2[C:12]([NH:13][C:14]([C:16]3[CH:17]=[N:18][N:19]4[CH:24]=[CH:23][CH:22]=[N:21][C:20]=34)=[O:15])=[CH:11][N:10]([CH2:30][C:31]([N:33]3[CH2:34][CH2:35][C:36]4([O:40][CH2:39][CH2:38][O:37]4)[CH2:41][CH2:42]3)=[O:32])[N:9]=2)[CH:7]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 438316402-Chloro-1-{1,4-dioxa-8-azaspiro[4.5]decan-8-yl}ethan-1-oneHCID 178522413HCID 178522413, compound

Product 1

HCID 118523245N-[3-[5-chloro-2-(difluoromethoxy)phenyl]-1-[2-(1,4-dioxa-8-azaspiro[4,5]decan-8-yl)-2-oxo-ethyl]pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamideYield 72%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of pyrazolo[1,5-a]pyrimidine-3-carboxylic acid [3-(5-chloro-2-difluoromethoxy-phenyl)-1H-pyrazol-4-yl]-amide (32.0 g, 79.1 mmol) in DMF (400 mL) was treated with 2-chloro-1-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-ethanone (20.8 g, 94.9 mmol) and Cs2CO3 (51.5 g, 158.1 mmol) and the mixture was stirred at room temperature for 19 hours. The reaction was diluted with water (˜1.6 L) and the resultant precipitate was collected by filtration. The solid was washed with water dried under reduced pressure to afford pyrazolo[1,5-a]pyrimidine-3-carboxylic acid {3-(5-chloro-2-difluoromethoxy-phenyl)-1-[2-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-2-oxo-ethyl]-1H-pyrazol-4-yl}-amide as a beige solid (33.3 g, 72%). LCMS (Method 3) [M+H]+=588.2, RT=3.02 min. 1H NMR (400 MHz, CDCl3) δ: (ppm) 9.85 (s, 1H), 8.78 (dd, 1H, J=1.6, 6.9 Hz), 8.71 (s, 1H), 8.56 (dd, 1H, J=1.8, 4.0 Hz), 8.42 (s, 1H), 7.69 (d, 1H, J=2.5 Hz), 7.41 (dd, 1H, J=2.7, 8.7 Hz), 7.30-7.26 (m, 1H), 7.00 (dd, 1H, J=4.2, 6.9 Hz), 6.48 (t, 1H, J=74.0 Hz), 5.06 (s, 2H), 4.00-3.95 (m, 4H), 3.74 (dd, 2H, J=5.8, 5.8 Hz), 3.61 (dd, 2H, J=5.8, 5.8 Hz), 1.74-1.64 (m, 4H).

Workup

  1. filtrationthe resultant precipitate was collected by filtration
  2. washThe solid was washed with water
  3. customdried under reduced pressure

Sources & evidence

ORD record
ord-cf871d6dd9eb468cae22edb07a47e830
Source dataset
uspto-grants-2016_05
Patent number
US09346815B2

Reaction notes

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