Water → 4-Methoxy-5-methyl-6-(5-acetylmethyloxy-1-ethylpyrazol-4-yl) carbonylthiochroman-1,1-dioxide

HRID 1292500

Reaction equation

HRID 1292500 reaction equation
[CH3:1][O:2][CH:3]1[C:12]2[C:7](=[CH:8][CH:9]=[C:10]([C:14]([C:16]3[CH:17]=[N:18][N:19]([CH2:22][CH3:23])[C:20]=3[OH:21])=[O:15])[C:11]=2[CH3:13])[S:6](=[O:25])(=[O:24])[CH2:5][CH2:4]1.Br[CH2:27][C:28](=[O:30])[CH3:29].C(=O)([O-])[O-].[K+].[K+].O>C(C(C)=O)C>[CH3:1][O:2][CH:3]1[C:12]2[C:7](=[CH:8][CH:9]=[C:10]([C:14]([C:16]3[CH:17]=[N:18][N:19]([CH2:22][CH3:23])[C:20]=3[O:21][CH2:27][C:28](=[O:30])[CH3:29])=[O:15])[C:11]=2[CH3:13])[S:6](=[O:24])(=[O:25])[CH2:5][CH2:4]1

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 11715BromoacetoneHCID 178418308HCID 178418308, compound

Product 1

HCID 542958374-Methoxy-5-methyl-6-(5-acetylmethyloxy-1-ethylpyrazol-4-yl) carbonylthiochroman-1,1-dioxideYield 63%

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

4-Methoxy-5-methyl-6-(1-ethyl-5-hydroxypyrazol-4-yl) carbonylthiochroman-1,1-dioxide was used as a starting material (XIH). And, 0.4 g (1.10 mmol) thereof was dissolved in 10 ml of methyl ethyl ketone, and 0.15 g (1.10 mmol) of bromoacetone as a reaction reagent (XII) and 0.30 g (2.20 mmol) of potassium carbonate as a base were added. The resultant mixture was refluxed under heat for 3 hours. Water was added to the reaction mixture, and the reaction mixture was extracted with ethyl acetate. Its organic layer was separated, and dried over anhydrous sodium sulfate. Then, the solvent was distilled off under reduced pressure, and the resultant oil was purified with flush column chromatography (Wako Gel C-300: hexane/ethyl acetate=1:2) to give 0.29 g (yield 63%) of 4-methoxy-5-methyl-6-(5-acetylmethyloxy-1-ethylpyrazol-4-yl) carbonylthiochroman-1, 1-dioxide (Compound No. 59) as an end compound which comes under the general formula (XI). Table 20 shows the structures of the starting material (XIH) and the reaction reagent (XII), and the structure and the yield of the end product (XI).

Workup

  1. temperatureunder heat for 3 hours
  2. extractionthe reaction mixture was extracted with ethyl acetate
  3. customIts organic layer was separated
  4. dry with materialdried over anhydrous sodium sulfate
  5. distillationThen, the solvent was distilled off under reduced pressure
  6. customthe resultant oil was purified
  7. customwith flush column chromatography (Wako Gel C-300: hexane/ethyl acetate=1:2)

Sources & evidence

ORD record
ord-0bffe3c82dbb404bbcba4312f5ef3912
Source dataset
uspto-grants-1998_05
Patent number
US05756759

Linked notes

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