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Hydrochloric Acid → 3-Cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-5-(1-hydroxy-2,2,2-trifluoroethyl)-4-trifluoromethylthiopyrazole

HRID 568203
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 568203
[C:1]([C:3]1[C:7]([S:8][C:9]([F:12])([F:11])[F:10])=[C:6]([CH:13]=[O:14])[N:5]([C:15]2[C:20]([Cl:21])=[CH:19][C:18]([C:22]([F:25])([F:24])[F:23])=[CH:17][C:16]=2[Cl:26])[N:4]=1)#[N:2].[F:27][C:28]([Si](C)(C)C)([F:30])[F:29].[F-].C([N+](CCCC)(CCCC)CCCC)CCC.Cl>O1CCCC1>[C:1]([C:3]1[C:7]([S:8][C:9]([F:11])([F:10])[F:12])=[C:6]([CH:13]([OH:14])[C:28]([F:30])([F:29])[F:27])[N:5]([C:15]2[C:20]([Cl:21])=[CH:19][C:18]([C:22]([F:24])([F:25])[F:23])=[CH:17][C:16]=2[Cl:26])[N:4]=1)#[N:2]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 552549(Trifluoromethyl)trimethylsilane2×HCID 2724141Tetrabutylammonium Fluoride2×HCID 118120983-Cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-5-formyl-4-trifluoromethylthiopyrazole

Produkt 1

HCID 98274503-Cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-5-(1-hydroxy-2,2,2-trifluoroethyl)-4-trifluoromethylthiopyrazole
Ausbeute 46,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

The product of Example 3 (2.0 g, 0.0046 mol) was dissolved in anhydrous tetrahydrofuran (10 mL). Trifluoromethyltrimethylsilane (0.8 mL, 0.0055 mol) was added and the reaction cooled to 0° C. Tetrabutylammoniumfluoride (TBAF, 50 μL, cat.) was added. After intervals of 20 minutes, 1.5 hours, and 18 hours, aliquots of TBAF (50 μL) were added at 0° C. followed by warming to room temperature. After 21 hours, more trifluoromethyltrimethylsilane (0.8 mL, 0.0055 mol) was added and the reaction stirred for 5 days. This was poured into 10% hydrochloric acid (100 mL) and washed with diethyl ether (3×50 mL). The combined organic extracts wire washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and evaporated to an oil. This was purified by silica gel chromatography using an ethyl acetate in hexanes gradient to provide the title compound (1.08 g) as a white solid, m.p. about 106° C.

Aufarbeitung

  1. temperatureby warming to room temperature
  2. washwashed with diethyl ether (3×50 mL)
  3. washThe combined organic extracts wire washed with saturated aqueous sodium chloride solution
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. customevaporated to an oil
  7. customThis was purified by silica gel chromatography

Quellen und Nachweise

ORD-Eintrag
ord-6afcc7ee6cf746428a1965e781f81c0d
Quelldatensatz
uspto-grants-2001_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06180798B2

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