We describe a catalyst, oxidant, and coupling‐reagent free strategy to access 4‐membered
heterocycles, representing a unique example of visible‐light triggered intramolecular …

The development of green and sustainable approaches for the synthesis of small molecules
is always in demand. Oxetanes and azetidines are strained heterocycles that possess …

We report an example of non‐dearomative trifunctionalizing ipso‐spirocyclization of
unactivated alkenes through photoredox‐catalyzed, nitrogen‐radical‐triggered cyclization …

A novel Lewis acid catalyzed tandem cyclization reaction of internal alkynols and vinyl
azides has been achieved to afford a series of products containing a pyran-based indeno [1 …

In recent years, the drive for more potent and selective drugs has seen medicinal chemistry
move away from “flat” compounds and become increasingly interested in evaluating chiral …

Abstract Intermolecular [2+ 2] photocycloadditions represent a powerful method for the
synthesis of highly strained, four-membered rings. Although this approach is commonly …

An acid-catalyzed formal [3+ 2] cyclization/N, O-ketalization of in situ formed ortho-alkynyl
quinone methides (o-AQMs) and tryptophol derivatives was developed. With this method, a …

This work showcases an unprecedented Au (III)-catalyzed cascade cyclization of 2-(4-
hydroxyalkynyl) benzoates to access benzannulated [5, 5]-oxaspirolactones related to …

Successful implementation of a sequential Pd-catalyzed Sonogashira cross-coupling/iodine-
promoted 5-exo-dig cyclization procedure with pyridines bearing a terminal alkyne moiety …

Unfunctionalized indoles can be directly converted into 3, 3′-spirocyclic indolenines and
indolines upon reaction with electrophilic dihalides in the presence of t-BuOK/BEt3. This …