Cesium carbonate → N-(4-(4-chloro-2-fluoro-3-methoxyphenyl)-5-formylpyridin-2-yl)acetamide

HRID 870970Notes

Reaction equation

HRID 870970 reaction equation
Cl[C:2]1[C:7]([CH:8]=[O:9])=[CH:6][N:5]=[C:4]([NH:10][C:11](=[O:13])[CH3:12])[CH:3]=1.[Cl:14][C:15]1[CH:20]=[CH:19][C:18](B2OC(C)(C)C(C)(C)O2)=[C:17]([F:30])[C:16]=1[O:31][CH3:32].C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.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:14][C:15]1[CH:20]=[CH:19][C:18]([C:2]2[C:7]([CH:8]=[O:9])=[CH:6][N:5]=[C:4]([NH:10][C:11](=[O:13])[CH3:12])[CH:3]=2)=[C:17]([F:30])[C:16]=1[O:31][CH3:32]

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 670174932-(4-Chloro-2-fluoro-3-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 86695931N-(4-chloro-5-formylpyridin-2-yl)acetamide

Product 1

HCID 86695956N-(4-(4-chloro-2-fluoro-3-methoxyphenyl)-5-formylpyridin-2-yl)acetamideYield 34%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

A stirred solution of N-(4-chloro-5-formylpyridin-2-yl)acetamide (1.947 g, 8.72 mmol) (prepared as described in Example 18, Part D), 2-(4-chloro-2-fluoro-3-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (2.5 g, 8.72 mmol), cesium carbonate (5.69 g, 17.45 mmol) and Pd(PPh3)4 (0.504 g, 0.436 mmol) in a mixture of dioxane (30 mL) and water (5 mL) was purged with nitrogen for 5 minutes then heated to 85° C. for 14 h. The reaction mixture was cooled to rt and diluted with water (10 mL). The mixture was extracted with ethyl acetate (2×15 mL). The combined organic layers were washed with brine (20 mL), dried over sodium sulphate, and concentrated under reduced pressure. The residue was purified by silica gel chromatography using a gradient of ethyl acetate in hexanes to yield N-(4-(4-chloro-2-fluoro-3-methoxyphenyl)-5-formylpyridin-2-yl)acetamide (1.78 g, 2.95 mmol, 34% yield) as a white solid. LCMS (ESI) m/e 322.9 [(M+H)+, calcd for C15H13ClFN2O3 323.1]; LC/MS retention time (Method F): tR=0.89 min.

Workup

  1. customwas purged with nitrogen for 5 minutes
  2. temperatureThe reaction mixture was cooled to rt
  3. additiondiluted with water (10 mL)
  4. extractionThe mixture was extracted with ethyl acetate (2×15 mL)
  5. washThe combined organic layers were washed with brine (20 mL)
  6. dry with materialdried over sodium sulphate
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-c4edc0c462414f9b8106154ebab153a9
Source dataset
uspto-grants-2015_03
Patent number
US08969564B2

Reaction notes

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