Cesium carbonate → Methyl 4-(4-chloro-2-fluorophenyl)-6-methylnicotinate

HRID 870975노트

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HRID 870975 반응식
Cl[C:2]1[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][N:5]=[C:4]([CH3:12])[CH:3]=1.[Cl:13][C:14]1[CH:19]=[CH:18][C:17](B(O)O)=[C:16]([F:23])[CH:15]=1.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.O.C(OCC)(=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>[Cl:13][C:14]1[CH:19]=[CH:18][C:17]([C:2]2[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][N:5]=[C:4]([CH3:12])[CH:3]=2)=[C:16]([F:23])[CH:15]=1

참가 물질

8

반응물 3

HCID 10796Cesium carbonateHCID 4193595(4-Chloro-2-fluorophenyl)boronic acidHCID 20691977Methyl 4-chloro-6-methylpyridine-3-carboxylate

생성물 1

HCID 86695958Methyl 4-(4-chloro-2-fluorophenyl)-6-methylnicotinate수율 30%

시약·촉매·용매 4

HCID 178418397HCID 178418397, 화합물촉매HCID 962Water용매HCID 8857Ethyl Acetate용매HCID 312751,4-Dioxane용매

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온도
80 °C

실험 절차

A mixture of methyl 4-chloro-6-methylnicotinate (0.1 g, 0.539 mmol), (4-chloro-2-fluorophenyl) boronic acid (0.094 g, 0.539 mmol), Pd(PPh3)4 (0.031 g, 0.027 mmol) and Cs2CO3 (0.527 g, 1.616 mmol) in 1,4-dioxane (10 mL) was heated at 80° C. for 16 h. After cooling, the mixture was diluted with water (30 mL) and ethyl acetate (50 mL). The organic phase was collected, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by silica gel chromatography (20% EtOAc in pet. ether) to afford methyl 4-(4-chloro-2-fluorophenyl)-6-methylnicotinate (0.045 g, 0.161 mmol, 30% yield) as a yellow liquid. LCMS (ESI) m/e 280.0 [(M+H)+, calcd for C14H12ClFNO2 280.04]; LC/MS retention time (Method H): tR=2.51 min. 1H NMR (400 MHz, CDCl3) δ 7.96 (s, 1H), 7.13-7.29 (m, 3H), 6.44 (s, 1H), 3.94 (s, 3H), 2.49 (s, 3H).

후처리

  1. temperatureAfter cooling
  2. customThe organic phase was collected
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel chromatography (20% EtOAc in pet. ether)

출처 및 근거

ORD 기록
ord-d246b50e82674a51b31eb0932cd447d6
출처 데이터셋
uspto-grants-2015_03
특허 번호
US08969564B2

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