Indian Journal of Advances in Chemical Science, Volume: 9, Issue : 3, August 2021

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2021.903020

Research Article

Ultrasonically Assisted Thiocyanation of Aromatic and Heteroaromatic
Compounds Using Silica-Supported Bronsted Acids (HClO₄-SiO₂ and
KHSO₄-SiO₂) as Reusable Catalysts

Vijay Shekar Pulusu, K. C. Rajanna*, U. Umesh Kumar, M. Anil Kmar, Yaku Guguloth, Yadagiri Pulusu
 

ABSTRACT

When the HClO₄ and KHSO₄ were adsorbed on to the surface of silica gel grains, they will get high thermal and mechanical stabilities and these materials have been explored as a green catalyst for the thiocyanation reactions of aromatic, heteroaromatic compounds under conventional condition, and ultrasonically assisted conditions. In the ultrasonically assisted protocol, remarkable rate accelerations were exhibited and it offered selectivity in thiocyanation of aromatic compounds and heteroaromatic compounds with better yields. Moreover, these catalysts could be recycled using simple procedure up to five cycles with good catalytic efficiency. These developed protocols are also promising and comparable with the literature procedures.

Key words:    SiO₂-HClO₄, SiO₂-KHSO₄, NH₄SCN, Thiocyanation, Ultrasonic assisted reactions..

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