were calculated as ratio of the 5,6,7,8-tetrahydroquinoline-6-carboxylate quantity (mol) formed after 3.5 h of the reaction to overall copper quantity (mol) in the reaction mixture. Such TON values were in range from 3 to 53, and it can be concluded that Cu content in the reaction mixture did not govern the product yield (or activity of Cu differed in more than 10 times for different composites).