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Silver nanotechnology has received tremendous attention in recent years, owing to its wide range of applications in various fields and its intrinsic therapeutic properties. In this review, an attempt is made to critically evaluate the chemical, physical, and biological synthesis of silver nanoparticles (AgNPs) as well as their efficacy in the field of theranostics including microbiology and parasitology. Moreover, an outlook is also provided regarding the performance of AgNPs against different biological systems such as bacteria, fungi, viruses, and parasites (leishmanial and malarial parasites) in curing certain fatal human diseases, with a special focus on cancer. The mechanism of action of AgNPs in different biological systems still remains enigmatic. Here, due to limited available literature, we only focused on AgNPs mechanism in biological systems including human (wound healing and apoptosis), bacteria, and viruses which may open new windows for future research to ensure the versatile application of AgNPs in cosmetics, electronics, and medical fields.

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Generation of carbon‐metal species is extremely important in transition metal‐catalyzed organic synthesis. Among the various methods, 1,4‐metal migration is a very useful way to create new carbon‐metal species, which are not readily accessible via classic methods. This review summarized recent advances in transition metal‐catalyzed reactions, which involved one or more steps of 1,4‐metal migration. It focused mostly on the achievements in Pd and Rh‐catalyzed reactions, along with some of the remarkable results in Pt, Ir, Co, Fe‐involved transformations.

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