This review covers some unique diazo compounds, the coupling partners to access various
versatile functionalized nitrogen heterocycles, such as indoles, indolines, isoquinolines …

The past decade has witnessed tremendous developments in transition‐metal‐catalyzed C−
H bond activation and subsequent carbene migratory insertion reactions, thus assisting in …

We describe a photo‐induced reaction for the in situ generation of highly reactive alkyl diazo
species from carbonyl precursors via photo‐excitation of N‐tosylhydrazone anions. The …

The homologation of ketones with diazo compounds is a useful strategy to synthesize one-
carbon chain-extended acyclic ketones or ring-expanded cyclic ketones. However, the …

The formal C–H bond insertion reaction into aldehydes via 1, 2-hydride shift has been well
established; however, the formal C–C bond insertion is more challenging. In the presence of …

A metal-free benzannulation of diazo compounds under visible light irradiation was
developed. The photocatalytic single electron transfer by Hantzsch ester to the diazo …

The formal C–C bond insertion into aldehydes is an attractive methodology for the assembly
of homologated carbonyl compounds. However, the homologation of aldehydes has been …

The ability to manipulate C–C bonds for selective chemical transformations is challenging
and represents a growing area of research. Here, we report a formal insertion of diazo …

The difficulty in accessing and safely utilising non-stabilised diazo species has in the past
limited the application of this class of compounds. Here we explore further the use of …

Here, we describe the development of a Rh-catalyzed intramolecular one-carbon
homologation of unstrained aryl ketones through a formal 1, 1-insertion process of olefins …