A convenient method has been developed for the synthesis of biarenyl chalcogenides through the interaction of bicyclic arenes and diaryl dichalcogenides on the surface of basic alumina under ball milling without any metal catalyst or solvent. This methodology shows wide substrate scope and is of high potential in organic synthesis due to its green aspects of ease of operation, shorter reaction time, ambient conditions and high yields.

In recent times, desulfonylative radical-cross-coupling (RCC) has come to the forefront in synthetic organic, bio, and material chemistry as a powerful strategy to forge C-C and C-heteroatom bonds. Diverse functionalization through metal and photoredox-catalyzed desulfonylation reactions has attracted the scientific community due to the mild reaction conditions, wide functional group tolerance and excellent synthetic efficacy. In this review, we have highlighted the photoredox-mediated desulfonylation reactions developed in the last two decades. The current review will summarize the newly reported methodologies, with particular emphasis on their mechanistic aspects and selectivity issues which have paved a new way towards sustainable CC and CX (X= H or, heteroatom) bond formation.

A mild and convenient strategy has been developed for the para-selective chalcogenation of anilide scaffolds via C–H bond functionalization. This methodology employs one of the most earth-abundant and inexpensive Cu(II) catalysts and a commercially available simple aryl chalcogen source without any complex directing template, exogenous ligand, acid/base, oxidant, or other additives. The key feature of this methodology is an impressive regioselectivity along with a wide range of functional group tolerance with good to excellent yields under aerobic conditions.

Visible-light photoredox catalytic method for the generation of alkyl radicals using redox-active alkylsulfones to form a new C–C bond is reported.

Construction of synthetic macrocyclic host that can bind with neutral molecules and anions has potential applications in supramolecular chemistry. Herein, we have designed and synthesized blue light emitting an unsymmetrical neutral bis-urea macrocyclic host. This macrocycle can bind with neutral DMF molecule (1:1) as well as Cl À ion (1:1) through noncovalent interactions.X-Ray crystal structure, 1 H NMR titrations with Job's Plot, HRMS with isotropic distribution pattern, FT-IR, and density functional theory analysis revealed the binding of bis-urea macrocyclic host with the guest molecule.