Реакция #314409

Уравнение реакции

1,2-dibromoethane

Sodium hydride

4-trifluoromethyl-3-pyridinecarboxamide

Sodium hydride

Benzyl isothiocyanate

→

3-benzyl-2-(4-trifluoromethyl-3-pyridylcarbonyl)iminothiazolidine

Растворители

N,N-dimethylformamide

water

Ethyl acetate

Условия реакции

Обработка

1. 1
   workup.STIRRINGstirred at 20° C. for 1 hour
2. 2
   workup.STIRRINGstirred at 20° C. for 1 hour
3. 3
   workup.STIRRINGthen stirred for 5 hours
4. 4
   Сушкаthe organic phase dried (magnesium sulfate)
5. 5
   Другоеevaporated
6. 6
   Другоеthe residue purified by silica gel column chromatography
7. 7
   Промывкаeluting with n-hexane/ethyl acetate (3:1)

Методика

Sodium hydride (0.09 g, 60% dispersion in mineral oil) was added portionwise to a solution of 4-trifluoromethyl-3-pyridinecarboxamide (0.40 g) in N,N-dimethylformamide at 20° C., and stirred for 1 hour. Benzyl isothiocyanate (0.31 ml) was added and stirred at 20° C. for 1 hour, then 1,2-dibromoethane (0.30 ml) added and stirred at 20° C. for 1 hour. Sodium hydride (0.09 g, 60% dispersion in mineral oil) was added in portions to the solution then stirred for 5 hours. Ethyl acetate and water were added, the organic phase dried (magnesium sulfate), evaporated and the residue purified by silica gel column chromatography eluting with n-hexane/ethyl acetate (3:1) to give 3-benzyl-2-(4-trifluoromethyl-3-pyridylcarbonyl)iminothiazolidine (0.50 g, Compound D-40).

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