Facile Three-Component Synthesis of Macrocyclane-Fused Pyrazolo[3,4-b]pyridine Derivatives
作者:Bo Jiang、Yin-Ping Liu、Shu-Jiang Tu
DOI:10.1002/ejoc.201100127
日期:2011.6
A series of new functionalized macrocyclane-fused pyrazolo[3,4-b]pyridine derivatives with an aryl group at the 2-position of the pyridine nucleus have been synthesized by microwave-assistedthree-componentreactions of aldehydes, aminopyrazole and cycloketones in HOAc using 1.0 equiv. of TFA as a promoter. The procedure is facile, avoiding time-consuming and costly syntheses, tedious work-ups and
A simple and efficient procedure for the synthesis of pyrazoloisoquinoline and pyrazolopyridine derivatives by one-pot three-component condensation of aminopyrazoles, aldehydes, and cycloketones in water using carbonaceous material as solid acid catalyst is described. The procedure offers several advantages such as simple experimental and work-up procedures, high yield, recovery, and reusability of metal-free solid acid heterogeneous catalyst along with tolerance of a wide range of functional groups. (C) 2015 Elsevier Ltd. All rights reserved.