Coumarins fused with other aromatic units have recently emerged as a hot topic of research.
Their synthesis is partly based on classical methodologies such as Pechmann reaction or …

In recent years, carbon dots (CDs), that is, carbon nanoparticles less than 10 nm in size with
unique molecular properties including photoluminescence, biocompatibility, and water …

The dibenzopyranone scaffold is found in many natural products and biologically active
molecules, and was considered as a privileged structure, which is of great importance as …

Silver-catalyzed C (sp2)–H functionalization/C–O cyclization has been developed. The
scalable reaction proceeds at room temperature in an open flask. The present method …

A Pd-catalyzed alkyne and aryne annulation strategy via C–H activation has been
implemented for the synthesis of π-extended coumarins. This synthetic strategy provides a …

Compounds containing oxygen, nitrogen, or sulfur atoms inside the rings are attracting much
attention and interest due to their biological importance. In recent years, several methods for …

Highly efficient synthesis of benzochromenone based blue luminogens via a three-
component reaction of 2-hydroxychalcones, primary amines and β-ketoesters was …

Aryl 2-bromobenzoates and aryl 2-bromocyclohex-1-enecarboxylates are cyclized by
microwave irradiation in dimethylformamide in the presence of K2CO3 to give the …

An unprecedented Pd-catalyzed intramolecular Heck cyclization has been investigated on
halogenated diene scaffolds undergoing various mode of cyclization and termination …

Biomedical imaging techniques play a crucial role in clinical diagnosis, surgical intervention,
and prognosis. Fluorescence imaging in the second biological window (second near …