C(OCl)(C)(C)C.[N+:7]([C:10]1[CH:16]=[CH:15][C:13]([NH2:14])=[CH:12][CH:11]=1)([O-:9])=[O:8].[CH3:17][S:18][CH3:19].C[O-].[Na+]>C(Cl)Cl.C(#N)C.CO>[N+:7]([C:10]1[CH:16]=[CH:15][C:13]([NH2:14])=[C:12]([CH2:17][S:18][CH3:19])[CH:11]=1)([O-:9])=[O:8]The starting materials are prepared as follows: The solution of 23.4 g of t-butylhypochlorite in 20 ml of methylene chloride is added to that of 30.0 g of 4-nitroaniline and 27.0 g of dimethyl thioether in 650 ml of acetonitrile and 200 ml of methylene chloride while stirring at -40° under nitrogen. After 4 hours the temperature is raised to -20° and maintained there for three hours. After the addition of 30 g of sodium methoxide in 100 ml of methanol the mixture is refluxed for 15 hours, cooled, filtered and evaporated. The residue is dissolved in diethyl ether and filtered through a silica gel column to remove any unreacted 4-nitroaniline as its benzenesulfonate following addition of 17.4 g of benzenesulfonic acid. The filtrate is evaporated and the residue recrystallized from ethanol, to yield the 4-nitro-2-methylmercaptomethylaniline melting at 72°-77°.
Wird geladen…
