Methyl Acrylate → (E)-3-{4-[4-methyl-1-(2-pyrazolo[1,5-a]pyridin-3-yl-ethyl)-piperazin-2-yl]-phenyl}-acrylic acid methyl ester

HRID 549405

반응식

HRID 549405 반응식
Br[C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][N:12]([CH3:14])[CH2:11][CH2:10][N:9]2[CH2:15][CH2:16][C:17]2[CH:18]=[N:19][N:20]3[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=23)=[CH:4][CH:3]=1.[C:26]([O:30][CH3:31])(=[O:29])[CH:27]=[CH2:28].CN(C1CCCCC1)C1CCCCC1>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C(P(C(C)(C)C)C(C)(C)C)(C)(C)C.F[B-](F)(F)F>[CH3:31][O:30][C:26](=[O:29])/[CH:27]=[CH:28]/[C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][N:12]([CH3:14])[CH2:11][CH2:10][N:9]2[CH2:15][CH2:16][C:17]2[CH:18]=[N:19][N:20]3[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=23)=[CH:4][CH:3]=1

참가 물질

7

반응물 3

HCID 7294Methyl AcrylateHCID 24210N-Methyl dicyclohexylamineHCID 578992473-{2-[2-(4-Bromo-phenyl)-4-methyl-piperazin-1-yl]-ethyl}-pyrazolo[1,5-a]pyridine

생성물 1

HCID 57899306(E)-3-{4-[4-methyl-1-(2-pyrazolo[1,5-a]pyridin-3-yl-ethyl)-piperazin-2-yl]-phenyl}-acrylic acid methyl ester수율 97.1%

시약·촉매·용매 3

HCID 9811564Bis(dibenzylideneacetone)palladium촉매HCID 44558591Tri-t-butylphosphine fluoroborate촉매HCID 312751,4-Dioxane용매

반응 조건

온도
135 °C

실험 절차

A mixture of 3-{2-[2-(4-bromo-phenyl)-4-methyl-piperazin-1-yl]-ethyl}-pyrazolo[1,5-a]pyridine (1.0 g, 2.49 mmol), methyl acrylate (0.458 mL, 4.98 mmol), N-methyldicyclohexylamine (584 mg, 2.99 mmol), tri-(tert-butyl)phosphine-tetrafluoroborate (28.9 mg, 0.0997 mmol) and Pd2(dba)3 (22.8 mg, 0.02 mmol) in 1,4-dioxane (10 mL) was flushed with nitrogen and heated at 100° C. for 1 h and at 135° C. for 1 h under microwave irradiation. The reaction mixture was cooled to room temperature, filtered through Celite pad, and concentrated in vacuo. Purification via flash silica gel column chromatography (heptane/ethyl acetate) gave (E)-3-{4-[4-methyl-1-(2-pyrazolo[1,5-a]pyridin-3-yl-ethyl)-piperazin-2-yl]-phenyl}-acrylic acid methyl ester (0.978 g, 97% yield). LCMS (m/z): 405.30 (M+1).

후처리

  1. customwas flushed with nitrogen
  2. temperatureThe reaction mixture was cooled to room temperature
  3. filtrationfiltered through Celite pad
  4. concentrationconcentrated in vacuo
  5. customPurification via flash silica gel column chromatography (heptane/ethyl acetate)

출처 및 근거

ORD 기록
ord-480eefb903c84f53899ee8b0122ec693
출처 데이터셋
uspto-grants-2011_05
특허 번호
US07943652B2

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