Banoth Paplal

Room temperature multicomponent reactions (MCRs) are reported using Bi₂O₃, BiVO₄, and Bi₂WO₆ (nanoparticle) as heterogeneous catalysts. Among these, Bi₂WO₆ (5 mol%) nanoparticles showed excellent reactivity for the synthesis of functionalized dihydropyridine, polyhydroquinoline, 4<italic>H</italic>-chromene and 2-amino-4<italic>H</italic>-benzo[<italic>b</italic>]pyran derivatives in aqueous medium.

ABSTRACT An experimental study was carried out to investigate the flexural strength of glass‐fiber‐reinforced (multidirectional woven glass fiber) epoxy hybrid composites filled with different proportions (1, 1.5, 2, 2.5, and 3%) of graphitic carbon nitride (g‐C 3 N 4 ) filler. g‐C 3 N 4 powder filled glass epoxy composites were fabricated in conventional hand lay‐up method. Results showed an increase in flexural strength of g‐C 3 N 4 particles content by 2% and beyond which the strength decreased. With the addition of 2 wt % of g‐C 3 N 4 in glass‐fiber‐reinforced epoxy composites, the tensile strength increased by 11% and the flexural strength increased by 13%. The eroded surface of the specimen was observed under scanning electron microscope and the results are reported. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48413.

Various isoxazole–oxindole hybrids were synthesized <italic>via</italic> vinylogous Henry reaction of 3,5-dimethyl-4-nitroisoxazole and isatin under catalyst free conditions in water. The products obtained were functionalized using 1,6-Michael addition reaction.

Functionalized dibenzo-[1,4]-diazepin-1-ones are synthesized using the “on-water” concept in the presence of<sc>l</sc>-proline (organocatalyst; 20 mol%) and under catalyst free conditions (sealed tube) in an aqueous medium.