Cyanamide → (1-{6-[Trifluoromethyl]pyridin-3-yl}ethyl)(methyl)lambda4-sulfanylidenecyanamide

HRID 252204

Reaktionsgleichung

Reaktionsgleichung von HRID 252204
[N:1]#[C:2][NH2:3].[CH3:4][S:5][CH:6]([C:8]1[CH:9]=[N:10][C:11]([C:14]([F:17])([F:16])[F:15])=[CH:12][CH:13]=1)[CH3:7].Cl[O-].[Ca+2].Cl[O-].S(S([O-])=O)([O-])(=O)=O.[Na+].[Na+]>C(#N)C>[C:2]([N:3]=[S:5]([CH:6]([C:8]1[CH:9]=[N:10][C:11]([C:14]([F:17])([F:16])[F:15])=[CH:12][CH:13]=1)[CH3:7])[CH3:4])#[N:1]

Komponenten

6

Edukt 4

HCID 9864CyanamideHCID 24504Calcium hypochlorite2×HCID 656671Sodium PyrosulfiteHCID 248811195-[1-(Methylthio)ethyl]-2-trifluoromethylpyridine

Produkt 1

HCID 44139272(1-{6-[Trifluoromethyl]pyridin-3-yl}ethyl)(methyl)lambda4-sulfanylidenecyanamide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Reaktionsbedingungen

Temperatur
-5 °C

Versuchsvorschrift

Acetonitrile (50 mL), cyanamide (1.14 grams, 27.1 mmoles) and 3-[1-(methylthio)ethyl]-6-(trifluoromethyl)pyridine (5.00 grams, 22.6 mmoles, 99+% assay) were combined in a 100 mL, 3-necked round bottom flask equipped with a thermowell/K-thermocouple, stopper, nitrogen oil bubbler and magnetic stir bar. The stirred solution was cooled to about −5° C. with an acetone/ice bath. To this solution was added 55.96 grams of an aqueous 6.0 wt % calcium hypochlorite solution (3.36 grams of calcium hypochlorite, 23.5 mmoles, 65% available chlorine) dropwise over 44 minutes. Some undissolved solids were present in the calcium hypochlorite solution and were added as well. The temperature was kept below 0° C. during the addition. The pale yellow reaction mixture was allowed to stir at about 0° C. for 65 minutes. To the yellow reaction mixture was added 0.53 g (2.8 mmoles) of sodium metabisulfite, in portions as a solid to destroy any remaining oxidant. A white flocculant was present in the reaction mixture. It was removed by vacuum filtration of the entire reaction mixture through a medium sintered glass filter funnel. The filtrate was transferred to a separatory funnel and the phases were allowed to settle. The phases were separated and the aqueous phase re-extracted with acetonitrile (10 mL) and (15 mL). Sodium chloride (10.01 grams) was added to the aqueous phase during the second extraction to facilitate a phase break. The organics were combined and this acetonitrile/sulfilimine solution was used directly in the following oxidation. LC analysis indicated a 1.00:1.08 area ratio of the two sulfilimine isomers and showed sulfilimine at 80 area % and sulfoxide (two isomers) at 13 area %.

Aufarbeitung

  1. customequipped with a thermowell/K-thermocouple, stopper, nitrogen oil bubbler and magnetic stir bar
  2. additionwere added as well
  3. additionThe temperature was kept below 0° C. during the addition
  4. customin portions as a solid to destroy any remaining oxidant
  5. customIt was removed by vacuum filtration of the entire reaction mixture through a medium sintered glass
  6. filtrationfilter funnel
  7. customThe filtrate was transferred to a separatory funnel
  8. customThe phases were separated
  9. extractionthe aqueous phase re-extracted with acetonitrile (10 mL) and (15 mL)
  10. additionSodium chloride (10.01 grams) was added to the aqueous phase during the second extraction

Quellen und Nachweise

ORD-Eintrag
ord-ddb394a6b8ca4150b3ed84e610ed2391
Quelldatensatz
uspto-grants-2011_01
Patentnummer
US07868027B2

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