2-Aminoadamantane hydrochloride → 1-methyl-5-trifluoromethyl-1H-pyrazole-4-carboxylic acid adamantan-2-ylamide

HRID 12830

Reaction equation

HRID 12830 reaction equation
[CH3:1][N:2]1[C:6]([C:7]([F:10])([F:9])[F:8])=[C:5]([C:11]([OH:13])=O)[CH:4]=[N:3]1.CCN(C(C)C)C(C)C.[B-](F)(F)(F)F.CN(C(ON1C(=O)CCC1=O)=[N+](C)C)C.Cl.[NH2:44][CH:45]1[CH:52]2[CH2:53][CH:48]3[CH2:49][CH:50]([CH2:54][CH:46]1[CH2:47]3)[CH2:51]2>ClCCl.CN(C=O)C.O>[CH:46]12[CH2:54][CH:50]3[CH2:49][CH:48]([CH2:53][CH:52]([CH2:51]3)[CH:45]1[NH:44][C:11]([C:5]1[CH:4]=[N:3][N:2]([CH3:1])[C:6]=1[C:7]([F:10])([F:9])[F:8])=[O:13])[CH2:47]2

Participants

8

Reactant 4

HCID 253312-Aminoadamantane hydrochlorideHCID 81531DiisopropylethylamineHCID 28077711-Methyl-5-(trifluoromethyl)pyrazole-4-carboxylic AcidHCID 98575222-(2,5-Dioxopyrrolidin-1-yl)-1,1,3,3-tetramethylisouronium tetrafluoroborate

Product 1

HCID 250135421-methyl-5-trifluoromethyl-1H-pyrazole-4-carboxylic acid adamantan-2-ylamideYield 65%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

Methyl-5-trifluoromethyl-1H-pyrazole-4-carboxylic acid (77 mg, 0.4 mmol, CAS#: 119083-00-0, purchased from Bionet) was dissolved in a mixture of dry dichloromethane (3.2 mL) and dry DMF (0.8 mL). DIPEA (0.28 mL, 1.6 mmol) and TSTU (145 mg, 0.44 mmol) were added to the above mixture. After the mixture was stirred for 1 h, the appearance of active ester was detected by LC-MS. Then 2-aminoadamantane hydrochloride (75 mg, 0.4 mmol) was added. After another 2 hours water was added and the organic layer was separated. The aqueous layer was extracted twice with dichloromethane. The combined organic phases were dried under vacuum and purified by C-18 reversed phase HPLC with a gradient of 10-100% acetonitrile/water to give 1-methyl-5-trifluoromethyl-1H-pyrazole-4-carboxylic acid adamantan-2-ylamide (85 mg, 65%). Mass spectrum: m/z: 328.2 (M+1).

Workup

  1. customthe organic layer was separated
  2. extractionThe aqueous layer was extracted twice with dichloromethane
  3. customThe combined organic phases were dried under vacuum
  4. custompurified by C-18

Sources & evidence

ORD record
ord-b7c63b53a9564e1ea614af812d6e8e45
Source dataset
uspto-grants-2010_06
Patent number
US07728029B2

Linked notes

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