Arynes and donor–acceptor (D–A) cyclopropanes are two classes of strained systems
having the potential for numerous applications in organic synthesis. The last two decades …

The effective use of ring strain has been applied to considerable advantage for the
construction of complex systems. The focus here is directed towards cyclopropanes as …

Atom transfer radical addition of haloalkanes and α-halocarbonyls to olefins is efficiently
performed with the photocatalyst Ir [(dF (CF3) ppy) 2 (dtbbpy)] PF6. This protocol is …

Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition
reactions that allow highly efficient construction of various carbocycles and heterocycles …

Nitrogen‐containing molecules are the key structural constituent of many pharmaceutical
compounds that play a pivotal role in drug development. Owing to their multifaceted …

Conspectus The combination of two or more unsaturated structural units to form cyclic
organic compounds is commonly referred to as cycloaddition, and the combination of two …

Azomethine imines are considered 1, 3-dipoles of the aza-allyl type which are transient
intermediates and should be generated in situ but can also be stable and isolable …

The possibility of finding novel disconnections for the efficient synthesis of organic
molecules has driven the interest in developing technologies to directly functionalize C–H …

Ring opening of donor–acceptor cyclopropanes with various N-nucleophiles provides a
simple approach to 1, 3-functionalized compounds that are useful building blocks in organic …

In this paper we describe the phosphine-catalyzed [3+ 2],[3+ 3],[4+ 3], and [3+ 2+ 3]
annulations of azomethine imines and allenoates. These processes mark the first use of …