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Cesium carbonate → 5-Bromo-3-(5-ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-1-methylpyridin-2(1H)-one

HRID 1919088
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HRID 1919088 반응식
[CH2:1]([N:3]1[CH2:8][CH2:7][N:6]2[N:9]=[C:10]([NH2:12])[CH:11]=[C:5]2[CH2:4]1)[CH3:2].Br[C:14]1[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=[C:18]([Br:20])[CH:19]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.CO.C(OCC)C.C(OCC)(=O)C.O>[Br:20][C:18]1[CH:19]=[C:14]([NH:12][C:10]2[CH:11]=[C:5]3[CH2:4][N:3]([CH2:1][CH3:2])[CH2:8][CH2:7][N:6]3[N:9]=2)[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=1
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참가 물질

11

반응물 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-oneHCID 580439485-Ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-amine

생성물 1

HCID 580439185-Bromo-3-(5-ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-1-methylpyridin-2(1H)-one수율 28%

시약·촉매·용매 6

HCID 9832798Tris(dibenzylideneacetone) dipalladium촉매HCID 887Methanol용매HCID 962Water용매HCID 3283Diethyl Ether용매HCID 8857Ethyl Acetate용매HCID 312751,4-Dioxane용매

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온도
100 °C

실험 절차

A sealed tube was equipped with a magnetic stirrer and charged with 285b (1.1 g, 6.4 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one 5 (1.7 g, 6.4 mmol) and cesium carbonate (4.6 g, 14 mmol) in 1,4-dioxane (64 mL). After bubbling nitrogen through the solution for 30 min, Xantphos (440 mg, 0.8 mmol) and tris(dibenzylideneacetone) dipalladium(0) (400 mg, 0.5 mmol) were added, and the reaction mixture was heated to 100° C. for 16 h. After this time, water (50 mL) and ethyl acetate (50 mL) were added. The aqueous layer was separated and extracted with ethyl acetate (2×50 mL). The combined organic extracts were washed with brine (100 mL) and dried over sodium sulfate. The resulting residue was purified by column chromatography eluting with a gradient of methylene chloride-60:35:5 methylene chloride:diethyl ether:methanol to afford a 28% yield (620 mg) of 285c.

후처리

  1. customA sealed tube was equipped with a magnetic stirrer
  2. customAfter bubbling nitrogen through the solution for 30 min
  3. customThe aqueous layer was separated
  4. extractionextracted with ethyl acetate (2×50 mL)
  5. washThe combined organic extracts were washed with brine (100 mL)
  6. dry with materialdried over sodium sulfate
  7. customThe resulting residue was purified by column chromatography
  8. washeluting with a gradient of methylene chloride-60:35:5 methylene chloride

출처 및 근거

ORD 기록
ord-e14f199a635a4761b22bc78307a0ba89
출처 데이터셋
uspto-grants-2013_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08618107B2

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