C(=[C:5]1[C:10]([CH2:11][NH2:12])=[CH:9][CH:8]=[CH:7][NH:6]1)C(C)C.[CH3:13][C:14]([O-])([CH3:16])[CH3:15].[K+]>C1(C)C=CC=CC=1>[N:6]1[CH:7]=[CH:8][CH:9]=[C:10]([CH:11]=[N:12][CH2:13][CH:14]([CH3:16])[CH3:15])[CH:5]=1The procedure is carried out as in Example 1(b) but with the use of 80.1 g (0.495 mol) of isobutylidene-3-aminomethylpyridine, 2.5 g (0.0223 mol) of potassium tert-butylate and 75 ml of toluene. After a reaction time of 1 hour at 30°-35° C., distillation yields 74.5 g (0.46 mol) of 3-pyridylmethylidene-isobutylamine; yield 93% of theory; b.p. 108° C./2×103Pa; nD20 =1.5198.
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