Scheme 3.

From

Synthesis, Characterization and Biological Screening of Some Novel Sulphur Bridged Pyrazole, Thiazole, Coumarin and Pyrimidine Derivatives

Mohammed A. A. El-Nassag

World Journal of Organic Chemistry. 2017, 5(1), 17-26 doi:10.12691/wjoc-5-1-4