Benzoic Acid → n-{2-[4-(3,5-Dichlorobenzyl)-3,5-diethyl-1h-pyrazol-1-yl]ethyl}benzamide

HRID 723601Notes

Reaction equation

HRID 723601 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:18]=[C:19]([Cl:21])[CH:20]=1)[CH2:5][C:6]1[C:7]([CH2:16][CH3:17])=[N:8][N:9]([CH2:13][CH2:14][NH2:15])[C:10]=1[CH2:11][CH3:12].[C:22](O)(=[O:29])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.Cl.CN(C)CCCN=C=NCC>CN(C)C=O.CN(C)C1C=CN=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([CH:18]=[C:19]([Cl:21])[CH:20]=1)[CH2:5][C:6]1[C:7]([CH2:16][CH3:17])=[N:8][N:9]([CH2:13][CH2:14][NH:15][C:22](=[O:29])[C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:10]=1[CH2:11][CH3:12]

Participants

6

Reactant 3

HCID 243Benzoic AcidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 99233572-[4-(3,5-Dichlorobenzyl)-3,5-diethyl-1h-pyrazol-1-yl]ethanamine

Product 1

HCID 10181088n-{2-[4-(3,5-Dichlorobenzyl)-3,5-diethyl-1h-pyrazol-1-yl]ethyl}benzamideYield 37.2%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Procedure

A solution of the amine of Example 43 (98 mg, 0.30 mmol) in dimethylformamide (3.75 ml) was treated with benzoic acid (41 mg, 0.33 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (64 mg, 0.33 mmol) and 4-dimethylaminopyridine (81 mg, 0.66 mmol) and stirred at room temperature for 18 hours. The solution was concentrated under reduced pressure. The residue was partitioned between dichloromethane and saturated sodium hydrogencarbonate solution. The organic extract was dried over anhydrous magnesium sulphate, filtered and concentrated under reduced pressure. The crude material was purified by flash chromatography on silica gel eluting with dichloromethane:methanol (95:5, by volume) to afford the title compound (48 mg) as a white solid, m.p. 115–117° C.

Workup

  1. concentrationThe solution was concentrated under reduced pressure
  2. customThe residue was partitioned between dichloromethane and saturated sodium hydrogencarbonate solution
  3. extractionThe organic extract
  4. dry with materialwas dried over anhydrous magnesium sulphate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude material was purified by flash chromatography on silica gel eluting with dichloromethane:methanol (95:5, by volume)

Sources & evidence

ORD record
ord-ed52f90e30b64e31ac8b0f4a506145f4
Source dataset
uspto-grants-2006_11
Patent number
US07141585B2

Reaction notes

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