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Cesium carbonate → 2-(1-Methyl-1h-pyrazol-4-yl)-4-[(6-nitro-3-pyridinyl)oxy]pyridine

HRID 2278884
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HRID 2278884 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]1[CH:23]=[C:22](B2OC(C)(C)C(C)(C)O2)[CH:21]=[N:20]1.C([O-])([O-])=O.[Cs+].[Cs+]>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:18][N:19]1[CH:23]=[C:22]([C:2]2[CH:7]=[C:6]([O:8][C:9]3[CH:10]=[N:11][C:12]([N+:15]([O-:17])=[O:16])=[CH:13][CH:14]=3)[CH:5]=[CH:4][N:3]=2)[CH:21]=[N:20]1
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참가 물질

6

반응물 3

HCID 10796Cesium carbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 593227792-Chloro-4-((6-nitropyridin-3-yl)oxy)pyridine

생성물 1

HCID 904029412-(1-Methyl-1h-pyrazol-4-yl)-4-[(6-nitro-3-pyridinyl)oxy]pyridine수율 72.3%

시약·촉매·용매 2

HCID 178418397
HCID 178418397, 화합물
촉매
HCID 6228Dimethylformamide용매

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온도
90 °C

실험 절차

A suspension of Example A1 (14.38 g, 57.1 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (13.08 g, 62.9 mmol) and Cs2CO3 (55.9 g, 171 mmol) in DMF (150 mL) was sparged with Ar, treated with Pd(PPh3)4 (6.60 g, 5.71 mmol), sparged again with Ar and heated at 90° C. overnight. The mixture was cooled to RT, the solids removed via filtration through diatomaceous earth, washed with EtOAc and the filtrate concentrated to near-dryness. The residue was treated with EtOAc, washed with 5% LiCl (1×) and the aqueous layer back-extracted with EtOAc (4×). The combined organics were dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (MeOH/DCM) to afford 2-(1-methyl-1H-pyrazol-4-yl)-4-((6-nitropyridin-3-yl)oxy)pyridine (12.28 g, 72%). 1H NMR (400 MHz, DMSO-d6): δ 8.59 (d, J=2.8 Hz, 1 H), 8.49 (d, J=5.6 Hz, 1 H), 8.41 (d, J=8.9 Hz, 1 H), 8.29 (s, 1 H), 8.00 (d, J=0.7 Hz, 1 H), 7.97 (dd, J=8.9, 2.8 Hz, 1 H), 7.44 (d, J=2.4 Hz, 1 H), 6.97 (dd, J=5.6, 2.4 Hz, 1 H), 3.85 (s, 3 H); MS (ESI) m/z: 298.1 (M+H+).

후처리

  1. customsparged again with Ar
  2. temperatureThe mixture was cooled to RT
  3. customthe solids removed via filtration through diatomaceous earth
  4. washwashed with EtOAc
  5. concentrationthe filtrate concentrated to near-dryness
  6. additionThe residue was treated with EtOAc
  7. washwashed with 5% LiCl (1×)
  8. extractionthe aqueous layer back-extracted with EtOAc (4×)
  9. dry with materialThe combined organics were dried over Na2SO4
  10. concentrationconcentrated to dryness
  11. custompurified via silica gel chromatography (MeOH/DCM)

출처 및 근거

ORD 기록
ord-984985d927014243b0df75d8e1829b1e
출처 데이터셋
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09133183B2

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