Jjv. Eynde et al., BENTONITE K10 CLAY, AN EFFICIENT CATALYST FOR THE FORMATION OF NITROGEN DERIVATIVES, Bulletin des Societes chimiques belges, 104(6), 1995, pp. 387-392
Bentonite K10 clay has been used to catalyze the formation of enamino
carbonyl derivatives, 2-methyl-1H-benzimidazoles, Hantzsch 1,4-dihydro
pyridines, Hantzsch pyridines, 2-substituted 1,3-diphenylimidazolidine
s, and tetrahydropyranylbenzazoles.