Triethylamine → Methanesulfonic acid 1-(3-benzyloxy-1-methyl-4-oxo-1,4-dihydro-pyridin-2-yl)-2,2,2-trifluoro-ethyl ester

HRID 913013Notes

Reaction equation

HRID 913013 reaction equation
[CH2:1]([O:8][C:9]1[C:14](=[O:15])[CH:13]=[CH:12][N:11]([CH3:16])[C:10]=1[CH:17]([OH:22])[C:18]([F:21])([F:20])[F:19])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CCN(CC)CC.[CH3:30][S:31](Cl)(=[O:33])=[O:32]>C(Cl)Cl>[CH2:1]([O:8][C:9]1[C:14](=[O:15])[CH:13]=[CH:12][N:11]([CH3:16])[C:10]=1[CH:17]([O:22][S:31]([CH3:30])(=[O:33])=[O:32])[C:18]([F:20])([F:21])[F:19])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 67282870HCID 67282870, compound

Product 1

HCID 86623501Methanesulfonic acid 1-(3-benzyloxy-1-methyl-4-oxo-1,4-dihydro-pyridin-2-yl)-2,2,2-trifluoro-ethyl esterYield 19.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of 3-benzyloxy-1-methyl-2-(2,2,2-trifluoro-1-hydroxy-ethyl)-1H-pyridin-4-one (4 g) in CH2Cl2 (80 mL) was added Et3N (2.40 mL, 17.5 mmol), followed by methanesulfonyl chloride (1.25 mL, 16.2 mmol) at ice-water bath temperature. The resulting mixture was then stirred for 3 h. The reaction mixture was quenched with water and extracted twice with CH2Cl2 (2×50 mL). The combined organic fractions were washed with brine and dried over anhydrous sodium sulfate, filtered and concentrated to dryness. The residue was purified by flash column chromatography on silica gel using a mixture of CH2Cl2 and MeOH (95/5, v/v) as eluant, thereby affording the product, methanesulfonic acid 1-(3-benzyloxy-1-methyl-4-oxo-1,4-dihydro-pyridin-2-yl)-2,2,2-trifluoro-ethyl ester (0.97 g, 19.4% yield). MS-ESI (m/z): 391.9 [M+1]+, 206, 91.

Workup

  1. customThe reaction mixture was quenched with water
  2. extractionextracted twice with CH2Cl2 (2×50 mL)
  3. washThe combined organic fractions were washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated to dryness
  7. customThe residue was purified by flash column chromatography on silica gel using
  8. additiona mixture of CH2Cl2 and MeOH (95/5

Sources & evidence

ORD record
ord-09b3df07a15b48c0932387f523c0cfbe
Source dataset
uspto-grants-2011_09
Patent number
US08026261B2

Reaction notes

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