Acetyl chloride → 4-Methoxy-5-methyl-6-(1-ethyl-5-acetoxypyrazol-4-yl)carbonylthiochroman-1,1-dioxide

HRID 1458249

Reaktionsgleichung

Reaktionsgleichung von HRID 1458249
[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.C(N(CC)CC)C.[C:33](Cl)(=[O:35])[CH3:34].C(=O)([O-])[O-].[Na+].[Na+]>C(Cl)Cl>[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][C:33](=[O:35])[CH3:34])=[O:15])[C:11]=2[CH3:13])[S:6](=[O:24])(=[O:25])[CH2:5][CH2:4]1

Komponenten

6

Edukt 4

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 10340Sodium CarbonateHCID 178418308HCID 178418308, Verbindung

Produkt 1

HCID 221018894-Methoxy-5-methyl-6-(1-ethyl-5-acetoxypyrazol-4-yl)carbonylthiochroman-1,1-dioxideAusbeute 73 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

4-Methoxy-5-methyl-6-(1-ethyl-5-hydroxypyrazol-4-yl)carbonylthiochroman-1,1-dioxide was used as a starting material (XIH). And, 0.40 g (1.1 mmol) thereof was dissolved in 4 ml of methylene chloride, and 0.22 g (2.2 mmol) of triethylamine as a base and 0.17 g (2.2 mmol) of acetyl chloride as a reaction reagent (XII) were added. The resultant mixture was allowed to react at room temperature for 8 hours. A saturated sodium carbonate aqueous solution was added to the reaction mixture, the reaction mixture was extracted with ethyl acetate, and its organic layer was dried over anhydrous sodium sulfate. 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 0.33 g (yield 73%) of 4-methoxy-5-methyl-6-(1-ethyl-5-acetoxypyrazol-4-yl)carbonylthiochroman-1,1-dioxide (Compound No. 51) as an end compound which comes under the general formula (XI). Table 18 shows the structures of the starting material (XIH) and the reaction reagent (XII), and the structure and the yield of the end product (XI).

Aufarbeitung

  1. customto react at room temperature for 8 hours
  2. extractionthe reaction mixture was extracted with ethyl acetate, and its organic layer
  3. dry with materialwas dried over anhydrous sodium sulfate
  4. distillationThe solvent was distilled off under reduced pressure
  5. customthe resultant oil was purified
  6. customwith flush column chromatography (Wako Gel C-300: hexane/ethyl acetate=1:2)

Quellen und Nachweise

ORD-Eintrag
ord-5ac08b68d2d94accb28d940c1a7bdb3d
Quelldatensatz
uspto-grants-1998_12
Patentnummer
US05849926

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