Yevhenii V. Hrynyshyn, Anna R. Musiychuk, N. M. Tsizorik
Nov 1, 2019
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Journal
Chemistry of Heterocyclic Compounds
Abstract
4-Bromopyrazolo[1,5-a]pyrazines react with aryl(hetaryl)boronic acids in the presence of catalytic amounts of Pd(dppf)Cl2·CH2Cl2 and an excess of Cs2CO3 in the MeCN–H2O, 9:1 solvent system with the formation of 4-aryl(hetaryl)pyrazolo[1,5-a]pyrazines.