Synthesis and Antibacterial Activity of New Spiro[thiadiazoline-(pyrazolo[3,4-d]pyrimidine)] Derivatives

Scheme 2

1,3-Dipolar cycloaddition of 1,5-diethyl-1H-pyrazolo[3,4-d]pyrimidine-4(5H)-thione 2a and DPNI 3.