A facile, catalyst-free synthesis of new polycyclic pyrrolo[1,2-b]pyrazolone derivatives

Neat synthesis of isothiazole compounds, and studies on their synthetic applications and photophysical properties

Ammonium thiocyanate-promoted simple, rapid and eco-friendly neat synthesis of isothiazoles is developed for the first time.

A solvent- and catalyst-free tandem reaction: synthesis, and photophysical and biological applications of isoindoloquinazolinones

An easy green synthetic approach for fused isoindoloquinazolinones has been developed under neat reaction (yields up to 91%) conditions.

One-pot tandem cyclisation to pyrrolo[1,2-a][1,4]benzodiazepines: a modified approach to the Pictet-Spengler reaction

We have reported a one-pot two-step methodology for the synthesis of highly condensed heterocycles, pyrrolo[1,2-a][1,4]benzodiazepines, by a modified Pictet-Spengler reaction under mild conditions in a short time. Our approach has a few advantages over the conventional two components synthesis as it is step and atom economic, environmentally benign and a convergent synthetic method. We have discussed here the broad substrate scope of this novel methodology.

Intramolecular macrolactonization, photophysical and biological studies of new class of polycyclic pyrrole derivatives

Herein, we report an efficient synthesis of N-substituted pyrrole derivatives and their application to construct macrocyclic oxazocinone.

Pyrido[1,2-a]pyrimidinium ions--a novel bridgehead nitrogen heterocycles: synthesis, characterisation, and elucidation of DNA binding and cell imaging properties

A novel class of bridgehead nitrogen heterocycles, pyrido[1,2-a]pyrimidinium ions, has been readily synthesized by a two-step one-pot reaction in high yields (up to 93%). These ionic compounds are bench stable and moisture tolerant and have highly fluorescent properties (quantum yield up to 0.65). A characteristic bright bluish fluorescence was observed in polar solvents such as acetonitrile and fluorescent intensity gradually diminishes with decreasing the polarity of the medium, which becomes almost negligible in toluene. These compounds also show interesting bioactivity. DNA interaction, imaging, and viability experiments with human leukemic Jurkat and KG-1A cells revealed that they are potential candidates for cancer diagnosis.