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Short Paper | Regular issue | Vol 94, No. 10, 2017, pp.1958-1964
Published online, 17th August, 2017
DOI: 10.3987/COM-17-13784
Ultrasound Promoted Efficient Construction of Polycyclic-Fused Pyrazolo[4,3-c]pyridines via Domino Reaction

Ting Zhou, Dao-Lin Wang,* Jiao Xu,* Liang Yan, and Wei Ma

*College of Chemistry and Chemical Engineering, Bohai University, 19, Keji Rd., New Songshan District, Jinzhou City, Liaoning Province 121001, China


Ultrasonic-accelerated rapid protocol for the synthesis of polycyclic-fused pyrazolo[4,3-c]pyridines via SN2/Thorpe-Ziegler/Thorpe- Guareschi domino reactions of 4-acetyl-5-bromomethyl-1-phenyl-1H-pyrazole with salicylonitriles (2-mercaptobenzonitrile or 3-cyanopyridine-2(1H)-thiones). Ultrasoundbased methodology performed better than the conventional process in rates and yields.