Synthesis of 3-substituted imidazo[1,5-a]pyridines having 1-(N-picolinamidin-2-yl) group

Imidazo[1,5-a]pyridine derivatives: useful, luminescent and versatile scaffolds for different applications

In the last few years, imidazo[1,5-a]pyridine nuclei and derivatives have attracted growing attention due to their unique chemical structure and versatility, optical behaviours, and biological properties.

Natural aldehyde extraction and direct preparation of new blue light-emitting imidazo[1,5-a]pyridine fluorophores

This work describes the extraction of natural aldehydes and the use of extracts to synthesise new fluorescent imidazo[1,5-a]pyridine derivatives. The characterisation of the extracted aldehydes by different techniques and the optical study of the fluorescent products allow the design of new compounds suitable for pharmaceutical, down-shifting, microscopy and electronic applications. The fluorophores are generated by an easy one-pot cyclisation reaction in mild conditions without catalyst and with only water as by-product.

Synthesis of imidazo[1,5-a]pyridines via oxidative amination of the C(sp3)–H bond under air using metal–organic framework Cu-MOF-74 as an efficient heterogeneous catalyst

1,3-Diarylated imidazo[1,5-a]pyridines were synthesized via oxidative amination of the C(sp³)–H bond using Cu-MOF-74 as an efficient heterogeneous catalyst.

Polyethylene glycol (PEG-400): an efficient and recyclable reaction medium for the synthesis of pyrazolo[3,4-b]pyridin-6(7H)-one derivatives

A mild and efficient synthesis of pyrazolo[3,4-b]pyridine-6(7H)-one derivatives via a three-component reaction of an aldehyde, Meldrum's acid and 3-methyl-1H-pyrazol-5-amine using recyclable polyethylene glycol (PEG)-400 as a reaction medium is described. This method has the advantages of accessible starting materials, good yields, mild reaction conditions and begin environmentally friendly.