5-Amino-4-formyl pyrazole 1 was used as a precursor for the synthesis of 6- aminopyrazolo[3,4-b]pyridine-5-carbonitrile 2, and 6-aminopyrazolo[3,4-b]pyridine-5- carboxamides 3 and 4. Pyrazolo[3,4-bpyridines 2, 3, and 4 were treated with different reagents leading to structurally confirmed heterocycles. Mosquito adult females carry and transmit the causatives of many diseases to humans and other domestic animals. Therefore, their management has become a necessity. Ten of the synthesized compounds were tested for larvicidal activity against second-stage C. pipiens larvae. IR spectra were recorded on Shimadzu-408 infrared spectrophotometer. The NMR spectra were performed on a Bruker AV-400 spectrometer and JEOL ECA II 500 MHz. Mass spectrometry was provided on a Varian MAT 312 instrument in EI mode (70 eV). Lethal concentrations were calculated based on probit analysis. Biochemical