Three‐membered carbocyclic and heterocyclic ring structures are versatile synthetic
building blocks in organic synthesis with biological importance. Moreover, the inherent strain …

The development of two divergent and complementary Lewis acid catalyzed additions of
bicyclobutanes to imines is described. Microscale high‐throughput experimentation was …

Electronically unbiased arylcyclopropane functionalization has always been a challenge to
organic chemists, and the emergence of donor–acceptor cyclopropanes (DACs) has not …

Bicyclo [1.1. 0] butanes (BCBs), featuring two fused cyclopropane rings, have found
widespread application in organic synthesis. Their versatile reactivity towards radicals …

We describe the first electrochemical activation of D–A cyclopropanes and D–A
cyclobutanes leading after C (sp3)− C (sp3) cleavage to the formation of highly reactive …

We propose a new concept of the triple role of protic ionic liquids with nucleophilic anions: a)
a regenerable solvent, b) a Brønsted acid inducing diverse transformations via general acid …

Strain-release driven annulations with bicyclo [1.1. 0] butanes (BCBs) have become an
attractive area of research for the synthesis of bioisosteric bicyclohexane derivatives, which …

A novel class of highly activated donor‐acceptor cyclopropanes bearing only a single,
vinylogous acceptor is presented. These strained moieties readily undergo cycloadditions …

An organocatalytic enantioselective (3+ 3)-cycloaddition reaction of racemic cyclopropane
carbaldehydes and aryl hydrazones has been demonstrated for the first time. A wide range …

Abstract We present (3+ 2)‐and (4+ 2)‐cycloadditions of donor–acceptor (D–A)
cyclopropanes and cyclobutanes with N‐sulfinylamines and a sulfur diimide, along with a …