The pyrazolopyrazine ring system is a very interesting class of heterocyclic compounds that
were considered as important scaffolds of many efficacious biologically active agents that …

Microwave irradiation has been successfully applied in organic chemistry. Spectacular
accelerations, higher yields under milder reaction conditions and higher product purities …

A simple, facile, efficient and three-component procedure for the synthesis of spiro [indoline-
3, 4′-pyrazolo [3, 4-b] pyridine]-2, 6′(1′ H)-diones by the reaction of 4-hydroxycumarin …

A study on the behaviour of vinylpyrazoles, pyrazolyl imines and pyrazolyl hydrazones as
dienes or dipoles is reported. Cycloaddition of the aforementioned compounds with electron …

New series of pyrazolopyridines 1–15 were synthesized and esteemed for antimicrobial
effectiveness against S. aureus, B. cereus, E. coli, P. aeruginosa, C. albicans, A. fumigatus …

Microwave irradiation induces the cycloaddition of pyrazolylimines with aromatic and
aliphatic nitroalkenes to afford pyrazolo [3, 4-b] pyridines in 5–20min. Some of these …

The synthesis of spiro [benzo [h] pyrazolo [3, 4-b][1, 6] naphthyridine-7, 3′-indoline]-2′, 6
(5H)-diones and spiro [chromeno [4, 3-b] pyrazolo [4, 3-e] pyridine-7, 3′-indoline]-2′, 6 …

Synthesis of bi functionally substituted thieno [2, 3-c] pyrazole compounds was carried out
by a new method. The substituted group at position five is namely (carbonitrile …

Novel methyl 4, 7-dihydro-1H-pyrazolo [3, 4-b] pyridine-5-carboxylates 3a–e have been
prepared in a two step procedure from the readily available 2-oxo-1, 2, 3, 4 …

Mercaptomethylpyrazolopyrimidine (2) was synthesized and reacted with ethyl
chloroacetate to afford ethyl pyrazolpyrimidinylmethylmercapto acetate (3), which in turn was …