Cesium carbonate → 1,1-Dimethyl-3-(4-((6-nitropyridin-3-yl)oxy)pyridin-2-yl)urea

HRID 626508

반응식

HRID 626508 반응식
Cl[C:2]1[CH:7]=[C:6]([O:8][C:9]2[CH:10]=[N:11][C:12]([N+:15]([O-:17])=[O:16])=[CH:13][CH:14]=2)[CH:5]=[CH:4][N:3]=1.[CH3:18][N:19]([CH3:23])[C:20]([NH2:22])=[O:21].C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2].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]>[CH3:18][N:19]([CH3:23])[C:20]([NH:22][C:2]1[CH:7]=[C:6]([O:8][C:9]2[CH:10]=[N:11][C:12]([N+:15]([O-:17])=[O:16])=[CH:13][CH:14]=2)[CH:5]=[CH:4][N:3]=1)=[O:21]

참가 물질

7

반응물 3

HCID 10796Cesium carbonateHCID 11737N,N-DimethylureaHCID 593227792-Chloro-4-((6-nitropyridin-3-yl)oxy)pyridine

생성물 1

HCID 904108451,1-Dimethyl-3-(4-((6-nitropyridin-3-yl)oxy)pyridin-2-yl)urea수율 51.2%

시약·촉매·용매 3

HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)촉매HCID 9811564Bis(dibenzylideneacetone)palladium촉매HCID 312751,4-Dioxane용매

반응 조건

온도
95 °C

실험 절차

A mixture of Example A1 (1 g, 3.97 mmol) in dioxane (20 mL) was sparged with Ar, treated with N,N-dimethyl urea (0.700 g, 7.95 mmol) and Cs2CO3 (1.942 g, 5.96 mmol), sparged with Ar, treated with dppf [1,1′-bis(diphenylphosphino)ferrocene] (12.38 g, 22.33 mmol) and Pd2(dba)3 (0.182 g, 0.199 mmol), sparged once again with Ar and heated at 95° C. overnight. The mixture was cooled to RT, treated with EtOAc and the solids removed via filtration through silica gel. The filtrate was concentrated to dryness and purified twice via silica gel chromatography (MeOH/DCM) to afford 1,1-dimethyl-3-(4-((6-nitropyridin-3-yl)oxy)pyridin-2-yl)urea (616 mg, 51%). MS (ESI) m/z: 304.1 (M+H+).

후처리

  1. customsparged with Ar
  2. customsparged once again with Ar
  3. temperatureThe mixture was cooled to RT
  4. additiontreated with EtOAc
  5. customthe solids removed via filtration through silica gel
  6. concentrationThe filtrate was concentrated to dryness
  7. custompurified twice via silica gel chromatography (MeOH/DCM)

출처 및 근거

ORD 기록
ord-3201dcc5150d41e88ce9e0c5933e6f3e
출처 데이터셋
uspto-grants-2016_04
특허 번호
US09309224B2

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