An efficient approach to pyrazolo[5,1-a]isoquinolin-2-amines via a silver(i)-catalyzed three-component reaction of 2-alkynylbenzaldehyde, sulfonohydrazide, and nitrile?

Organic & Biomolecular Chemistry Pub Date: 2011-08-03 DOI: 10.1039/C1OB05917C

Abstract

A three-component reaction of 2-alkynylbenzaldehyde, sulfonohydrazide, and nitrile catalyzed by silver triflate under mild conditions is reported, which generates pyrazolo[5,1-a]isoquinolin-2-amines in good to excellent yields.

Graphical abstract: An efficient approach to pyrazolo[5,1-a]isoquinolin-2-amines via a silver(i)-catalyzed three-component reaction of 2-alkynylbenzaldehyde, sulfonohydrazide, and nitrile
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