Triethylamine → 1-((3-chloro-1-(pyridin-3-yl)-1H-pyrazol-4-yl)(ethyl)amino)-1-oxopropan-2-yl acetate

HRID 929304Notes

Reaction equation

HRID 929304 reaction equation
Cl.Cl.[Cl:3][C:4]1[C:8]([NH:9][CH2:10][CH3:11])=[CH:7][N:6]([C:12]2[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=2)[N:5]=1.C(N(CC)CC)C.[C:25]([O:28][CH:29]([CH3:33])[C:30](Cl)=[O:31])(=[O:27])[CH3:26]>C(Cl)Cl>[C:25]([O:28][CH:29]([CH3:33])[C:30]([N:9]([C:8]1[C:4]([Cl:3])=[N:5][N:6]([C:12]2[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=2)[CH:7]=1)[CH2:10][CH3:11])=[O:31])(=[O:27])[CH3:26]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 45474922-Acetoxypropionyl ChlorideHCID 86705836HCID 86705836, compound

Product 1

HCID 867005991-((3-chloro-1-(pyridin-3-yl)-1H-pyrazol-4-yl)(ethyl)amino)-1-oxopropan-2-yl acetate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a stirred solution of 3-chloro-N-ethyl-1-(pyridin-3-yl)-1H-pyrazol-4-amine dihydrochloride (3.00 g, 10.2 mmol) in CH2Cl2 (20 mL) cooled in an ice bath were added triethylamine (5.7 mL, 40.6 mmol) followed by dropwise addition 1-chloro-1-oxopropan-2-yl acetate (1.3 mL, 10.2 mmol). The reaction mixture was stirred overnight warming to room temperature. The reaction mixture was then diluted with CH2Cl2 and washed with water. The phases were separated, and the organics were dried over MgSO4, filtered and concentrated. The residue was purified by silica gel chromatography eluting with 0%-70% acetone/hexanes to afford the title compound C12 as a tan taffy-like solid (3.2 g, 93%): 1H NMR (400 MHz, CDCl3) δ 8.99 (d, J=2.5 Hz, 1H), 8.62 (dd, J=4.8, 1.3 Hz, 1H), 8.18 (s, 1H), 8.04 (ddd, J=8.3, 2.7, 1.4 Hz, 1H), 7.46 (ddd, J=8.4, 4.8, 0.5 Hz, 1H), 5.01 (d, J=6.5 Hz, 1H), 3.54 (m, 2H), 2.09 (s, 3H), 1.39 (d, J=6.8 Hz, 3H), 1.17 (t, J=7.2 Hz, 3H); 13C NMR (101 MHz, CDCl3) δ 171.01, 148.62, 140.57, 140.24, 135.63, 127.56, 126.33, 124.06, 122.58, 67.49, 43.74, 20.61, 16.80, 12.57 (one carbon signal not located); ESIMS m/z 336.4 ([M+H]+), 335.0 ([M−H]−).

Workup

  1. washwashed with water
  2. customThe phases were separated
  3. dry with materialthe organics were dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel chromatography
  7. washeluting with 0%-70% acetone/hexanes

Sources & evidence

ORD record
ord-ddbe28478acc485183fb350523f723c8
Source dataset
uspto-grants-2016_03
Patent number
US09295260B2

Reaction notes

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