Tetrahydrofuran → 3-Bromo-n-[4-chloro-2-(n'-isopropylhydrazinocarbonyl)-6-methylphenyl]-1-(3-chloro-2-pyridinyl)-1h-pyrazole-5-carboxamide

HRID 251944

Reaction equation

HRID 251944 reaction equation
[Br:1][C:2]1[CH:6]=[C:5]([C:7]2[O:12][C:11](=[O:13])[C:10]3[CH:14]=[C:15]([Cl:19])[CH:16]=[C:17]([CH3:18])[C:9]=3[N:8]=2)[N:4]([C:20]2[C:25]([Cl:26])=[CH:24][CH:23]=[CH:22][N:21]=2)[N:3]=1.Cl.[CH:28]([NH:31][NH2:32])([CH3:30])[CH3:29].C(N(CC)CC)C.O1CCCC1>O>[Br:1][C:2]1[CH:6]=[C:5]([C:7]([NH:8][C:9]2[C:17]([CH3:18])=[CH:16][C:15]([Cl:19])=[CH:14][C:10]=2[C:11]([NH:32][NH:31][CH:28]([CH3:30])[CH3:29])=[O:13])=[O:12])[N:4]([C:20]2[C:25]([Cl:26])=[CH:24][CH:23]=[CH:22][N:21]=2)[N:3]=1

Participants

6

Reactant 4

HCID 8028TetrahydrofuranHCID 8471TriethylamineHCID 855731-Isopropylhydrazine hydrochlorideHCID 102533072-(3-Bromo-1-(3-chloropyridin-2-yl)-1H-pyrazol-5-yl)-6-chloro-8-methyl-4H-benzo[d][1,3]oxazin-4-one

Product 1

HCID 668540763-Bromo-n-[4-chloro-2-(n'-isopropylhydrazinocarbonyl)-6-methylphenyl]-1-(3-chloro-2-pyridinyl)-1h-pyrazole-5-carboxamideYield 50.1%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of 0.60 g of 2-[3-bromo-1-(3-chloro-2-pyridinyl)-1H-pyrazol-5-yl]-6-chloro-8-methyl-4H-3,1-benzoxazine-4-one, 0.29 g of isopropylhydrazine hydrochloride, 0.27 g of triethylamine and 6 ml of tetrahydrofuran was stirred at room temperature for 3 hours. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate two times. The combined organic layer was washed with an aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to obtain 0.35 g of 3-bromo-N-[4-chloro-2-(N′-isopropylhydrazinocarbonyl)-6-methylphenyl]-1-(3-chloro-2-pyridinyl)-1H-pyrazole-5-carboxamide of the formula:

Workup

  1. extractionthe mixture was extracted with ethyl acetate two times
  2. washThe combined organic layer was washed with an aqueous saturated sodium chloride solution
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-112415e04ac343e9a5cf10f8644ffcf4
Source dataset
uspto-grants-2011_01
Patent number
US07867949B2

Linked notes

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