A facile, mild and efficient procedure for the synthesis of fully substituted pyrazolo [3, 4-b]
pyridin-5-amines is reported. A mixture of an α-azidochalcone, a 5-aminopyrazole and t …

A one‐pot and convenient synthesis of multisubstituted pyrazolo [3, 4‐b] pyridines in
moderate to high yields has been achieved by a two‐step reaction: diazo‐transfer of 5‐azido …

The one-pot synthesis of azide-substituted dihydropyrazoles in isopropanol was performed
by using chalcones, hydrazine hydrate, and an acyl chloride at 0℃. Subsequent Staudinger …

A series of novel pyrazolo [1, 5-a] pyrazine derivatives has been synthesized using a facile
one-pot three-step protocol starting from pyrazole-3-carboxylic acids. The process occurs via …

1-Substituted 5-aminopyrazole-4-carbonylazides were prepared from the appropriate 5-
aminopyrazole-4-carboxylates. The acyl azides undergo a Curtius rearrangement followed …

In this study, we aimed to establish an efficient method for synthesizing two new series of
arene‐linked pyrazolo [1, 5‐a] pyrimidines. This was achieved by reacting 1 H‐pyrazole‐3, 5 …

An efficient synthesis of novel ethyl-1, 3, 4-triphenyl-1H-pyrazolo [3, 4-b] pyridine-6-
carboxylate products has been achieved via condensation of pyrazole-5-amine derivatives …

New efficient synthetic methods in pyrazoline and pyrazolopyrazine chemistry have been
developed starting from 2, 2‐dichlorovinylacetophenones 1, which were sequentially …

A novel cascade reaction of 4‐arylidene‐2‐phenyl‐1, 3‐oxazol‐5 (4H)‐one with 3‐methyl‐1‐
phenyl‐1H‐pyrazol‐5‐amine was described and a number of new pyrazolo [3, 4‐b] pyridine …

A novel and convenient synthesis of thiazolo[3,2-a]pyrimidin-7-ones and pyrido[1,2-a]pyrimidin-2-ones
using Vilsmeier reagent - ScienceDirect Skip to main contentSkip to article Elsevier logo …