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Thionyl Chloride → N-[4-(2-Pyrimidinylsulfonyl)phenyl]-3,3-difluoro-2-hydroxy-2-difluoromethyl propionamide

HRID 327216
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 327216
[F:1][CH:2]([F:11])[C:3]([CH:8]([F:10])[F:9])([OH:7])[C:4](O)=[O:5].S(Cl)(Cl)=O.[N:16]1[CH:21]=[CH:20][CH:19]=[N:18][C:17]=1[S:22]([C:25]1[CH:31]=[CH:30][C:28]([NH2:29])=[CH:27][CH:26]=1)(=[O:24])=[O:23].C(=O)(O)[O-].[Na+]>CC(N(C)C)=O.O>[N:16]1[CH:21]=[CH:20][CH:19]=[N:18][C:17]=1[S:22]([C:25]1[CH:31]=[CH:30][C:28]([NH:29][C:4](=[O:5])[C:3]([OH:7])([CH:8]([F:10])[F:9])[CH:2]([F:11])[F:1])=[CH:27][CH:26]=1)(=[O:23])=[O:24]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 24386Thionyl ChlorideHCID 516892Sodium BicarbonateHCID 218172744-(2-Pyrimidylsulfonyl)anilineHCID 222874542,2-Bis-difluoromethyl-2-hydroxyacetic acid

Produkt 1

HCID 21480149N-[4-(2-Pyrimidinylsulfonyl)phenyl]-3,3-difluoro-2-hydroxy-2-difluoromethyl propionamideAusbeute 34 %

Reagenzien, Katalysatoren, Lösungsmittel

2
HCID 962WaterLösungsmittelHCID 31374DimethylacetamideLösungsmittel

Reaktionsbedingungen

Temperatur
-10 °C

Versuchsvorschrift

To a solution of 2,2-bis-difluoromethyl-2-hydroxyacetic acid (0.5 g, 2.84 mmoles) in dimethyl acetamide (10 ml) at -10° C. was added thionyl chloride (0.34 g, 2.84 mmole)s) dropwise. The resulting solution was stirred at -10° C. for approximately 30 mins. 4-(2-pyrimidylsulfonyl)aniline (0.59 g, 2.5 mmoles) was added and the reaction mixture was stirred overnight at room temperature. The reaction mixture was poured into water, and sodium bicarbonate solution was added to give a pH of 7-7.5. A dark colored precipitate was formed that was filtered, washed with water and dried. The crude material was preabsorbed onto silica gel and chromatographed on silica gel eluting with 70-80% ethyl/acetate/hexane. Evaporation of product-containing fractions and crystallization from methylene chloride/methanol/hexane gave the title compound (0.33 g, 34%) as a white solid; mp 209°-210° C. 1H--NMR (300 MHz, d6 --DMSO):6.46(t, J=54.06 Hz, 2H, HCF 2), 7.78 (t, J=4.8 Hz, 1H, ArH), 7.95-7.98(m, 3H, ArH, OH), 8.02-8.06(m, 2H, ArH), 9.01 (d, J=5.01 Hz, 2H, ArH), 10.58 (s, 1H, NH). MS(CI):394(M+1, 100%).

Aufarbeitung

  1. stirringthe reaction mixture was stirred overnight at room temperature
  2. additionwas added
  3. customto give a pH of 7-7.5
  4. customA dark colored precipitate was formed
  5. filtrationthat was filtered
  6. washwashed with water
  7. customdried
  8. customThe crude material was preabsorbed onto silica gel
  9. customchromatographed on silica gel eluting with 70-80% ethyl/acetate/hexane
  10. customEvaporation of product-containing fractions and crystallization from methylene chloride/methanol/hexane

Quellen und Nachweise

ORD-Eintrag
ord-864f3a1e6ee94ec78ffab8004067fc4f
Quelldatensatz
uspto-grants-1993_12
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05272163

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