In the electromagnetic spectrum, the microwave radiation region is located between infrared
radiation and radio waves. Microwaves have wavelengths of 1 mm±1 m, corresponding to …

In the past decade, interest in pyrazole chemistry has significatively increased mainly due to
the discovery of the interesting properties exhibited by a great number of pyrazole …

Azomethine imines are considered 1, 3-dipoles of the aza-allyl type which are transient
intermediates and should be generated in situ but can also be stable and isolable …

More Sustainable Approaches for the Synthesis of N-Based Heterocycles | Chemical Reviews
ACS ACS Publications C&EN CAS Find my institution Log In Chemical Reviews ACS …

Pyrazoles are an important class of heterocycles found in a wide range of bioactive
compounds and pharmaceuticals. Pyrazole synthesis often requires hydrazine or related …

In this review, we report the important role of solvent-free conditions coupled with microwave
activation and their advantages in heterocyclic synthesis. This eco-friendly approach, which …

Microwave irradiation has been applied with success to cycloaddition reactions. The special
characteristics of such irradiation entails the use of new methodologies, including …

A regioselective synthesis of 1, 3, 4-tri-or 1, 3, 4, 5-tetrasubstituted pyrazoles by the reaction
of hydrazones with nitroolefins is described. Mediated with strong bases such as t-BuOK, the …

Heterocyclic chemistry constitutes an essential branch of organic chemistry and
heterocycles are widely known to display an array of biological properties. Pyrazoles …

1.1 Introduction due to the ability of some compounds (solids or liquids) to transform
electromagnetic energy into heat, microwave (MW) radiation has been widely employed in …