S(S([O-])=O)([O-])=O.[Na+].[Na+].[CH3:9][C:10]1[CH:15]=[CH:14][C:13]([N:16]2[CH:20]=[CH:19][CH:18]=[CH:17]2)=[C:12]([N+:21]([O-])=O)[CH:11]=1.O1CCCC1>O.C(O)C>[NH2:21][C:12]1[CH:11]=[C:10]([CH3:9])[CH:15]=[CH:14][C:13]=1[N:16]1[CH:20]=[CH:19][CH:18]=[CH:17]120 g of sodium hydrosulfite are added portionwise to a solution of 18.18 g (0.09 mole) of 1-(4-methyl-2-nitrophenyl)pyrrole in 400 ml. of tetrahydrofuran and 200 ml. of water. The resulting solution is heated on a steam bath for 5 minutes and an additional 20 g. of sodium hydrosulfite are added and the solution is heated for 5 minutes on a steam bath. Then 38.3 g. of sodium hydrosulfite and a solution of 400 ml. of ethanol and 500 ml. of water are added, and again the solution is heated on a steam bath for 5 minutes. The solvent is removed to give a tan solid which is recrystallized from hexane to give white crystals, m.p. 89°-90° C. of 1-(2-amino-4-methylphenyl)pyrrole.
Wird geladen…
