an efficient one-pot green approach for the synthesis of αaminonitriles with alsba-15 as nano tubular catalytic reactor

Nanoporous heterogeneous alsba-15 (x) type aluminosilicate catalyst with different nsi/nal ratios (x = 41, 129, and 210) was synthesized using hydrothermal method. alsba-15 catalysts were characterized by xrd, n2 sorption, tpd-nh3, ft-ir, sem and tem. xrd analyses of alsba-15 catalysts confirmed the presence of well-ordered crystalline structure with p6mm symmetry. n2 isotherm of alsba-15 catalyst materials showed a type iv adsorption isotherm with h1 hysteresis loops. the specific surface area and specific pore volume of the alsba-15 catalysts are in the rage from 480 to 757 m2/g and from 0.65 to 0.95 cm3/g, respectively. sem analysis of alsba-15 (41) revealed a worm-like particle morphology comprising particles in a size range of 3 μm with the co-existence of smaller particles of ca. 1 μm size. a distinct approach adopted for the synthesis of α-aminonitriles using heterogeneous nanoporous alsba-15 catalyst via strecker reaction. this one-pot, three component system of amines (primary/secondary), carbonyl compounds (aldehydes/ketone) and tmscn compounds proceed excellently in the presence of alsba-15 catalyst in water medium at room temperature (rt). the major advantages are excellent yield, short reaction time, high chemo-selectivity, simple experimental procedure, recyclability of the catalyst, easy work up procedure. this one-pot synthesis consists of two consecutive steps: (1) imine formation from amine and aldehyde/ketone and (2) cyano addition to imine. the findings suggest that catalyst is recyclable and can be reused up to six cycles.