Triethylamine → N-cyclopropyl-3-(difluoromethyl)-N-[1-(indan-2-yl)ethyl]-5-fluoro-1-methyl-1H-pyrazole-4-carboxamide

HRID 704960Notes

Reaction equation

HRID 704960 reaction equation
[F:1][CH:2]([F:13])[C:3]1[C:7]([C:8](Cl)=[O:9])=[C:6]([F:11])[N:5]([CH3:12])[N:4]=1.[CH2:14]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH2:16][CH:15]1[CH:23]([NH:25][CH:26]1[CH2:28][CH2:27]1)[CH3:24].C(N(CC)CC)C>O1CCCC1>[CH:26]1([N:25]([CH:23]([CH:15]2[CH2:16][C:17]3[C:22](=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:14]2)[CH3:24])[C:8]([C:7]2[C:3]([CH:2]([F:13])[F:1])=[N:4][N:5]([CH3:12])[C:6]=2[F:11])=[O:9])[CH2:28][CH2:27]1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 529205085-fluoro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carbonyl chlorideHCID 66685521HCID 66685521, compound

Product 1

HCID 66685256N-cyclopropyl-3-(difluoromethyl)-N-[1-(indan-2-yl)ethyl]-5-fluoro-1-methyl-1H-pyrazole-4-carboxamideYield 34.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
70 °C

Procedure

At ambient temperature, a solution of 217 mg (1.02 mmol) of 3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carbonyl chloride in 1 ml of tetrahydrofurane is added dropwise to a solution of 202 mg (0.93 mmol) of N-[1-(indan-2-yl)ethyl]cyclopropanamine and 103 mg (1.02 mmol) of triethylamine in 5 ml of tetrahydrofurane. The reaction mixture is stirred for 1 hr at 70° C. The solvent is removed under vacuum and 100 ml of water are then added to the residue. The watery layer is extracted twice with ethyl acetate (2×150 ml) and the combined organic layers are successively washed by a 1 N solution of HCl, a saturated solution of potassium carbonate and filtered over a chemelut™ cardridge to yield after concentration 190 mg of a beige oil. Column chromatography on silica gel (gradient heptane/ethyl acetate) yields 120 mg (30% yield) of N-cyclopropyl-3-(difluoromethyl)-N-[1-(indan-2-yl)ethyl]-5-fluoro-1-methyl-1H-pyrazole-4-carboxamide as a colourless oil (M+H=378).

Workup

  1. customThe solvent is removed under vacuum and 100 ml of water
  2. additionare then added to the residue
  3. extractionThe watery layer is extracted twice with ethyl acetate (2×150 ml)
  4. washthe combined organic layers are successively washed by a 1 N solution of HCl
  5. filtrationa saturated solution of potassium carbonate and filtered over a chemelut™ cardridge
  6. customto yield after concentration 190 mg of a beige oil

Sources & evidence

ORD record
ord-48782f2332e145e3bf901ba495a417c1
Source dataset
uspto-grants-2015_11
Patent number
US09173399B2

Reaction notes

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