2-(4-Oxo-1-phenyl-4, 5-dihydro-1H-pyrazolo [3, 4-d] pyrimidin-6-yl) acetonitrile was used as
the key intermediate for the synthesis of polyfunctionally substituted heterocycles (eg …

4‐(Thiazol‐2‐yldiazenyl)‐1H‐pyrazole‐3, 5‐diamine (2) was prepared by the reaction of 2‐
thiazolylazomalononitrile (1) with hydrazine hydrate in boiling ethanol and used as key …

3‐(1H‐Indol‐3‐yl)‐1H‐pyrazol‐5‐amine 3 was prepared in a quantitative yield by heating 3‐
(1H‐indol‐3‐yl)‐3‐oxopropanenitrile 2 in dry ethanol with hydrazine hydrate, and utilized as …

A new series of functionalized pyrano [2, 3-c] pyrazoles and pyrazolo [4′, 3′: 5, 6] pyrano
[2, 3-d] pyrimidines bearing a bioactive chromone ring was achieved. The methodology …

Dimethyl‐1H‐pyrazolo [3, 4‐b] pyridine‐3‐amine (1) was used as a key intermediate for the
synthesis of imidazolopyrazole derivatives 7–11 upon interaction with 3‐(2‐bromoacetyl) …

5‐Hydrazineyl‐3‐methyl‐1H‐pyrazole (1) was used as a starting material for the synthesis
of novel pyrazolo [3, 4‐c][1, 2] diazepine derivatives 3, 4, and 6a, b by its reaction with …

Arylidenes have been utilized as a scaffold for synthesis of different heterocyclic compounds
such as thiazolo [3, 2-a] pyridine, pyridinium salt of pyrano [2, 3-d] pyrimidine and 2 …

This effort focuses on the construction of novel pyrazolo [1, 5‐a] pyrimidines bearing indole
nucleus via the reaction of 3‐(1H‐indol‐3‐yl)‐1H‐pyrazol‐5‐amine (3) with the appropriate …

4-(Benzo [d][1, 3] dioxol-5-yl)-2-hydrazinyl-6-oxo-1, 6-dihydropyrimidine-5-carbonitrile was
utilised to construct fused heterocyclic systems, namely triazolopyrimidines, as well as non …

The novel 2-(1 H)-pyridone, the lead compound of the pyridone derivative 1, reacted with an
electrophilic reagent (ethyl chloroacetate) to give the corresponding ester 2. Condensation …