Water → Ethyl 9-[N-(2-chloro-4-fluorophenyl)sulfamoyl]-3,3-bis(hydroxymethyl)-1,5-dioxaspiro[5.5]undec-7-ene-8-carboxylate

HRID 546345Notes

Reaction equation

HRID 546345 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[NH:9][S:10]([CH:13]1[C:18]([C:19]([O:21][CH2:22][CH3:23])=[O:20])=[CH:17][C:16]([O:26][CH3:27])([O:24][CH3:25])[CH2:15][CH2:14]1)(=[O:12])=[O:11].C[Si](C)(C)[O:30][CH2:31][C:32](CO[Si](C)(C)C)(CO[Si](C)(C)C)[CH2:33][O:34][Si](C)(C)C.O>ClCCl.FC(F)(F)S(O[Si](C)(C)C)(=O)=O>[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[NH:9][S:10]([CH:13]1[CH2:14][CH2:15][C:16]2([O:24][CH2:25][C:32]([CH2:33][OH:34])([CH2:31][OH:30])[CH2:27][O:26]2)[CH:17]=[C:18]1[C:19]([O:21][CH2:22][CH3:23])=[O:20])(=[O:11])=[O:12]

Participants

6

Reactant 3

HCID 962WaterHCID 5294792,2,8,8-Tetramethyl-5,5-bis(((trimethylsilyl)oxy)methyl)-3,7-dioxa-2,8-disilanonaneHCID 67192731Ethyl 6-[N-(2-chloro-4-fluorophenyl)sulfamoyl]-3,3-dimethoxy-1-cyclohexene-1-carboxylate

Product 1

HCID 16659749Ethyl 9-[N-(2-chloro-4-fluorophenyl)sulfamoyl]-3,3-bis(hydroxymethyl)-1,5-dioxaspiro[5.5]undec-7-ene-8-carboxylateYield 87%

Reagents, catalysts & solvents 2

HCID 65367Trimethylsilyl triflateCatalystHCID 6344DichloromethaneSolvent

Procedure

500 mg (1.19 mmol) of ethyl 6-[N-(2-chloro-4-fluorophenyl)sulfamoyl]-3,3-dimethoxy-1-cyclohexene-1-carboxylate obtained in Example (16a) and 1.0 g (2.38 mmol) of 1,3-bis[(trimethylsilyl)oxy]-2,2-bis[(trimethylsilyl)oxy]methylpropane were dissolved in 10 ml dichloromethane and 10 μl (0.06 mmol) of trimethylsilyl trifluoromethanesulfonate was added thereto with stirring under ice-cooling, followed by stirring for 2 hours at the same temperature. Water was added to the reaction solution and the mixture was extracted with ethyl acetate. The organic layer was washed with water and dried over anhydrous magnesium sulfate, followed by concentration under reduced pressure. The residue was subjected to silica gel column chromatography (solvent; ethyl acetate alone) to give 510 mg of the title compound as an amorphous substance (yield: 87%).

Workup

  1. temperaturecooling
  2. stirringby stirring for 2 hours at the same temperature
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationfollowed by concentration under reduced pressure

Sources & evidence

ORD record
ord-9ac2f614ac654e61b9494b6990352601
Source dataset
uspto-grants-2011_05
Patent number
US07935835B2

Reaction notes

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