Borane;tetrahydrofuran → 2-chloro-5-[1,4-dimethyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]-4-fluorobenzenemethanol

HRID 1378299Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1378299
[Cl:1][C:2]1[CH:10]=[C:9]([F:11])[C:8]([C:12]2[C:16]([CH3:17])=[C:15]([C:18]([F:21])([F:20])[F:19])[N:14]([CH3:22])[N:13]=2)=[CH:7][C:3]=1[C:4](O)=[O:5].B.C1COCC1>C1COCC1>[Cl:1][C:2]1[CH:10]=[C:9]([F:11])[C:8]([C:12]2[C:16]([CH3:17])=[C:15]([C:18]([F:19])([F:21])[F:20])[N:14]([CH3:22])[N:13]=2)=[CH:7][C:3]=1[CH2:4][OH:5]

Komponenten

4

Edukt 2

HCID 2723981Borane;tetrahydrofuranHCID 229064292-Chloro-5-[1,4-dimethyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]-4-fluorobenzoic acid

Produkt 1

HCID 229064162-chloro-5-[1,4-dimethyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]-4-fluorobenzenemethanolAusbeute 90,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

A solution of 1.5 g of 2-chloro-5-[1,4-dimethyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]-4-fluorobenzoic acid (Ex. 2) in 30 mL of anhydrous THF was treated with 10 mL of 1.0M borane-THF solution and heated to reflux for 24 hr. The mixture was allowed to cool and added to ice water. A precipitate formed which was collected by filtration, washed with cold water and dried to give 1.3 g of 2-chloro-5-[1,4-dimethyl-5-(trifluoromethyl)-1H-pyrazol-3-yl]-4-fluorobenzenemethanol as a white solid: mp 58° C.; 1HNMR (CDCl3) δ 2.09 (q, 3H), 4.00 (s, 3H), 4.75 (s, 2H), 7.20 (d, 1H), 7.57 (d, 1H).

Aufarbeitung

  1. temperatureheated
  2. temperatureto reflux for 24 hr
  3. temperatureto cool
  4. customA precipitate formed which
  5. filtrationwas collected by filtration
  6. washwashed with cold water
  7. customdried

Quellen und Nachweise

ORD-Eintrag
ord-c88deff243d243d4ac3dc117b3b8dcd1
Quelldatensatz
uspto-grants-1997_09
Patentnummer
US05668088

Notizen zur Reaktion

Wird geladen…