Ammonium Chloride → 5-((2R,4S)-4-fluoro-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxamide

HRID 513043Notes

Reaction equation

HRID 513043 reaction equation
[F:1][C@@H:2]1[CH2:6][N:5]([C:7]2[CH:12]=[CH:11][N:10]3[N:13]=[CH:14][C:15]([C:16]([OH:18])=O)=[C:9]3[CH:8]=2)[C@@H:4]([C:19]2[CH:24]=[CH:23][CH:22]=[C:21]([F:25])[CH:20]=2)[CH2:3]1.CC[N:28](C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[NH4+].[Cl-]>CN(C=O)C.[NH4+].[OH-].CCOC(C)=O>[F:1][C@@H:2]1[CH2:6][N:5]([C:7]2[CH:12]=[CH:11][N:10]3[N:13]=[CH:14][C:15]([C:16]([NH2:28])=[O:18])=[C:9]3[CH:8]=2)[C@@H:4]([C:19]2[CH:24]=[CH:23][CH:22]=[C:21]([F:25])[CH:20]=2)[CH2:3]1

Participants

8

Reactant 4

HCID 25517Ammonium ChlorideHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 601713195-((2R,4S)-4-fluoro-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylic acid

Product 1

HCID 601714355-((2R,4S)-4-fluoro-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxamide

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolventHCID 14923Ammonium HydroxideSolvent

Procedure

To a solution of 5-((2R,4S)-4-fluoro-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylic acid (X-3) (42 mg, 0.12 mmol) in DMF (1 mL) was added DIEA (64 μL, 0.36 mmol) and HATU (51 mg, 0.13 mmol). The reaction was stirred at room temperature for 10 minutes, then a solution of NH4Cl (20 mg, 0.36 mmol) in NH4OH (100 μL) was added and stirred for 3 hours. The crude reaction mixture was diluted with EtOAc and washed with water, brine, dried over magnesium sulfate, filtered and reduced to dryness. Purification by column chromatography on silica gel with DCM/MeOH gradient as eluant gave 5-((2R,4S)-4-fluoro-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxamide (X-5). 1H NMR (400 MHz, CDCl3) δ 8.10 (d, J=7.6 Hz, 1 H), 7.96 (s, 1H), 7.32 (td, J=6.0, 7.8 Hz, 1H), 7.20 (d, J=2.4 Hz, 1 H), 7.06 (d, J=7.6 Hz, 1 H), 6.99-6.90 (m, 2 H), 6.21 (dd, J=2.8, 7.6 Hz, 1 H), 5.40 (bs, 2 H), 5.38 (d, J=52.4 Hz, 1 H), 5.05 (dd, J=7.2, 9.2 Hz, 1 H), 4.18-3.92 (m, 2 H), 2.92-2.80 (m, 1 H), 2.11 (dddd, J=3.6, 9.2, 13.2, 40.0 Hz, 1 H). MS m/z 343.1 (M+1)+.

Workup

  1. stirringstirred for 3 hours
  2. customThe crude reaction mixture
  3. washwashed with water, brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. customPurification by column chromatography on silica gel with DCM/MeOH gradient as eluant

Sources & evidence

ORD record
ord-906cc2f94ed84a2b8c63de02556b9fa2
Source dataset
uspto-grants-2015_08
Patent number
US09102671B2

Reaction notes

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