[CH2:1]([O:3][C:4]([C:6]1[C:7]([CH3:21])=[N:8][C:9](Cl)=[C:10]([N+:17]([O-:19])=[O:18])[C:11]=1[NH:12][CH2:13][CH2:14][CH2:15][CH3:16])=[O:5])[CH3:2].[CH2:22]([NH2:24])[CH3:23]>>[CH2:1]([O:3][C:4]([C:6]1[C:7]([CH3:21])=[N:8][C:9]([NH:24][CH2:22][CH3:23])=[C:10]([N+:17]([O-:19])=[O:18])[C:11]=1[NH:12][CH2:13][CH2:14][CH2:15][CH3:16])=[O:5])[CH3:2]4-Butylamino-6-chloro-2-methyl-5-nitropyridine-3-carboxylic acid ethyl ester is treated with ethylamine according to the procedure in Example 1 c and 4-butylamino-6-ethylamino-2methyl-5-nitropyridine-3-carboxylic acid ethyl ester is obtained, yield 86%, m.p. 53°-55° (methanol).
Wird geladen…