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

HRID 1021951노트

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HRID 1021951 반응식
Br[C:2]1[C:3](=[O:10])[N:4]([CH3:9])[CH:5]=[C:6]([Br:8])[CH:7]=1.[NH2:11][C:12]1[CH:23]=[C:15]2[CH2:16][N:17]([C:20](=[O:22])[CH3:21])[CH2:18][CH2:19][N:14]2[N:13]=1.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.C(=O)([O-])[O-].[Cs+].[Cs+]>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].O1CCOCC1>[C:20]([N:17]1[CH2:18][CH2:19][N:14]2[N:13]=[C:12]([NH:11][C:2]3[C:3](=[O:10])[N:4]([CH3:9])[CH:5]=[C:6]([Br:8])[CH:7]=3)[CH:23]=[C:15]2[CH2:16]1)(=[O:22])[CH3:21]

참가 물질

7

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 580440081-(2-amino-6,7-dihydropyrazolo[1,5-a]pyrazin-5(4H)-yl)ethanone

생성물 1

HCID 580440563-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one수율 98.3%

시약·촉매·용매 2

HCID 9811564Bis(dibenzylideneacetone)palladium촉매HCID 312751,4-Dioxane용매

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온도
100 °C

실험 절차

A 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 3,5-dibromo-1-methylpyridin-2(1H)-one (481 mg, 1.8 mmol), 209b (270 mg, 1.5 mmol), 1,4-dioxane (20 mL), Pd2(dba)3 (137 mg, 0.15 mmol), XantPhos (173 mg, 0.30 mmol), and cesium carbonate (978 mg, 3.0 mmol). After three cycles of vacuum/argon flush, the mixture was heated at 100° C. for 6 h. After this time the reaction was cooled to room temperature. It was then filtered and the filtrate was evaporated in vacuo. The residue was purified by silica-gel column chromatography eluting with 50:1 dichloromethane/methanol to afford 209c (540 mg, 89%) as a yellow solid. MS: [M+H]+368.0

후처리

  1. customA 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
  2. customAfter three cycles of vacuum/argon flush
  3. temperatureAfter this time the reaction was cooled to room temperature
  4. filtrationIt was then filtered
  5. customthe filtrate was evaporated in vacuo
  6. customThe residue was purified by silica-gel column chromatography
  7. washeluting with 50:1 dichloromethane/methanol

출처 및 근거

ORD 기록
ord-71cfab89a21a4e92b22956a9fb8729e8
출처 데이터셋
uspto-grants-2014_05
특허 번호
US08716274B2

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