4-Phenyl derivatives of spinaceamine and spinacine undergo mild catalytic hydrogenation under atmospheric pressure with cleavage of the C-4-N-5 bond to give 5-benzyl-substituted histamines and histidines. The process is likely to be facilitated by the double benzylic effect on the C-N bond of the imidazole and benzene rings.
Dehydrogenation of 4-phenyl-substituted spinaceamine and spinacine
作者:N. N. Smolyar、M. G. Abramyants、Yu. M. Yutilov
DOI:10.1134/s1070428006040099
日期:2006.4
The dehydrogenation of 4-phenyl-substituted spinaceamine and spinacine with elemental sulfur in dimethylformamide at 120-150 degrees C leads to the corresponding imidazo[4,5-c]pyridines. Sulfur may be regarded as a specific reagent for oxidative decarboxylation which accompanies dehydrogenation of 4-phenyl-substituted spinacine derivatives.