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

HRID 215999Notes

Reaction equation

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

Participants

Conditions

Temperature: -1 °C

Procedure

solution of 110.6 g (0.475 mol, 95% assay) of 3-[1-(methylthio)ethyl]-6-(trifluoromethyl)pyridine and 25.2 g (0.6 mol) of cyanamide in 600 mL of acetonitrile was cooled to −5° C. To this solution was added 750 g (0.575 mol, Clorox™ 5.7% wt) of aqueous NaOCl dropwise over 45 min with the temperature kept below 0° C. The reaction mixture was allowed to stir at −1° C. for 30 min To the mixture was added 9.5 g (0.05 mol) of sodium metabisulfite in 25 mL of water and the two phase mixture was allowed to settle. The aqueous phase was re-extracted 2×'s with 50 mL of acetonitrile. The organics were combined and this acetonitrile/sulfilimine solution was used directly in the following oxidation. LC analysis indicated a 40:54 (area) ratio of two isomers.

Workup

customkept below 0° C
extractionThe aqueous phase was re-extracted 2×'

Sources & evidence

ORD record: ord-dab76a547c634406aef6d3fa12e4d8c3
Source dataset: uspto-grants-2012_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08193222B1

Reaction notes

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