Diisopropylethylamine → N-(4-bromo-1-methyl-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide

HRID 1466574노트

반응식

HRID 1466574 반응식
[N:1]1[N:5]2[CH:6]=[CH:7][CH:8]=[N:9][C:4]2=[C:3]([C:10]([OH:12])=O)[CH:2]=1.[Br:13][C:14]1[C:15]([NH2:20])=[N:16][N:17]([CH3:19])[CH:18]=1.C(N(CC)C(C)C)(C)C>CN(C)C1C=CN=CC=1.CN(C)C=O>[Br:13][C:14]1[C:15]([NH:20][C:10]([C:3]2[CH:2]=[N:1][N:5]3[CH:6]=[CH:7][CH:8]=[N:9][C:4]=23)=[O:12])=[N:16][N:17]([CH3:19])[CH:18]=1

참가 물질

6

반응물 3

HCID 81531DiisopropylethylamineHCID 1910189Pyrazolo[1,5-a]pyrimidine-3-carboxylic acidHCID 27352834-bromo-1-methyl-1H-pyrazol-3-amine

생성물 1

HCID 66851236N-(4-bromo-1-methyl-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide수율 63%

시약·촉매·용매 2

HCID 142844-(Dimethylamino)pyridine촉매HCID 6228Dimethylformamide용매

실험 절차

A solution of pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (165.5 mg, 1.014 mmol, 1.01 eq), 4-bromo-1-methyl-1H-pyrazol-3-amine (177.4 mg, 1.008 mmol, 1.0 eq), N,N,N′,N′-tetramethyl-O-(7-azabenzotriazol-1-yl)uranium hexafluorophosphate (497 mg, 1.31 mmol, 1.30 eq), N,N-diisopropylethylamine (0.25 mL, 1.4 mmol, 1.4 eq), and 4-dimethylaminopyridine (33.8 mg, 0.277 mmol, 0.27 eq) in 5 mL N,N-dimethylformamide was heated at 50° C. for 4 days. The reaction mixture was partitioned between ethyl acetate and water, and the organic portion washed with brine, dried over magnesium sulfate and concentrated. The crude product was purified by flash chromatography on silica gel (20 to 80% ethyl acetate in dichloromethane (containing 5% methanol)) to yield 203.6 mg (63%) of N-(4-bromo-1-methyl-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide. LCMS (ESI) m+H=321.1; 1H NMR (400 MHz, CD3OD) δ: 9.16 (d, 1H), 8.84 (d, 1H), 8.68 (s, 1H), 7.76 (s, 1H), 7.28 (d of d, 1H), 3.88 (s, 3H).

후처리

  1. customThe reaction mixture was partitioned between ethyl acetate and water
  2. washthe organic portion washed with brine
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated
  5. customThe crude product was purified by flash chromatography on silica gel (20 to 80% ethyl acetate in dichloromethane (containing 5% methanol))

출처 및 근거

ORD 기록
ord-edeb9c13b5494389a32a4d59069883f2
출처 데이터셋
uspto-grants-2015_04
특허 번호
US08999998B2

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