C–H functionalization is a fundamentally important organic transformation to access C–C
and C–heteroatom bonds in a common and/or complex molecular set-up during the …

In this account, we summarized our recent efforts to develop molecular transformations
under Brønsted base catalysis on the basis of our own guiding principles for designing …

Larger condensed arenes are of interest owing to their electro‐and photochemical
properties. An efficient synthesis is the catalyzed aromatic annulation of a smaller arene with …

A metal‐free, visible light‐induced [4+ 2] benzannulation of biaryldiazonium salts with
alkynes was developed. With eosin Y as photoredox catalyst, a variety of 9‐substituted or 9 …

A palladium-catalyzed decarbonylative annulation of 2-arylbenzoic acids with internal
alkynes via C (sp2)–H activation has been developed. A series of phenanthrenes were …

An efficient synthesis of functionalized phenanthrenes has been developed for the first time
involving an iron (III)-catalyzed intramolecular coupling of 2′-alkynyl-biphenyl-2 …

A new method for the synthesis of phenanthrenes via ligand-free CuBr2-catalyzed
coupling/cyclization of terminal alkynes with N-tosylhydrazones derived from o-formyl …

The transmetalation triggered rhodium‐catalyzed C− H bond activation and tandem
annulation of 2‐biphenylboronic acids with sulfoxonium ylides or iodonium ylides has been …

A novel protocol for the synthesis of phenanthrenes through the copper-catalyzed reaction of
aromatic tosylhydrazones with terminal alkynes is explored. The reaction proceeds via the …

The synthesis of functionalized phenanthrene derivatives was achieved by intramolecular
cyclization utilizing the [1, 2]‐phospha‐Brook rearrangement under Brønsted base catalysis …