1,1'-Thiocarbonyldiimidazole → HCID 57554365, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-[1-(methylsulfonimidoyl)ethyl]-2-(trifluoromethyl)pyridine (E) (400 mg, 1.59 mmol) in acetonitrile (5 mL), 1,1′-thiocarbonyldiimidazole (353 mg, 1.59 mmol, 1 eq) was added and stirred over night. A second aliquot of 1,1′-thiocarbonyldiimidazole (71 mg, 0.317 mmol, 0.2 eq) was added and the mixture heated to 60° C. for two hours. The solvent was removed under reduced pressure, the residue dissolved in CHCl3 and washed five times with water. The organic phase was dried (Na2SO4) and chloroform was removed under reduced pressure. N-(Methyl(oxo){1-[6-(trifluoromethyl)-3-pyridinyl]ethyl}-λ6-sulfanylidene)-1H-imidazole-1-carbothioamide (Y) was obtained as an orange-brown residue, which was dried in the high vacuum over night (371 mg, 1.02 mmol, 64%). A 1:1 mixture of diastereomes with a purity of 94% was observed by UPLC-UV/ELSD and NMR, which was sufficient for subsequent conversions. Higher purities were obtained by filtration of the residue through a plug of silica (7.5% MeOH in CHCl3). 1H NMR (CDCl3, 400 MHz): δ=1.83 (d, J=7.1 Hz, 1.5H, CHCH3, diastereomer 1); 1.86 (d, J=7.1 Hz, 1.5H, CHCH3, diastereomer 2); 2.86 (s, 1.5H, S—CH3, diastereomer 1); 2.89 (s, 1.5H, S—CH3, diastereomer 2); 4.32 (q, J=7.1 Hz, 0.5H, CHCH3, diastereomer 1); 4.37 (q, J=7.1 Hz, 0.5H, CHCH3, diastereomer 2); 7.68-7.85 (m, 2H, Ar), 7.97-8.14 (m, 2H, Ar), 8.67-8.82 (m, 2H, Ar), UPLC-MS (ESI+): mass calc'd for C13H12F3N4OS2 (M+H+): 363.0, found 363.1, UPLC-MS (ESI+) mass calc'd for C13H14F3N4OS2 (M−H+): 361.0, found 361.1.

Provenance & Evidence