Expedient Synthesis of Pyrroloquinolinones by Rh-Catalyzed Annulation of N-Carbamoyl Indolines with Alkynes through a Directed C–H Functionalization/C–N Cleavage Sequence

Rhodium-catalyzed tunable oxidative cyclization toward the selective synthesis of α-pyrones and furans

The Rh^III-catalyzed tunable oxidative cyclization of readily availableN-tosylacrylamides and diazo compounds toward the selective synthesis of fully substituted furans and α-pyrones is presented.

Rhodium-catalyzed annulation of arenes with alkynes through weak chelation-assisted C–H activation

This feature article reviews the recent achievements of rhodium-catalyzed annulation of arenes with alkynes through weak chelation-assisted C–H activation, which sets a stage for the synthesis of diverse appealing polycyclic compounds.

Ru-catalysed C–H silylation of unprotected gramines, tryptamines and their congeners

Directed and undirected Ru-catalysed C–H silylation of unprotected heteroarenes is presented which requires no protecting groups.

Iridium(iii)- and rhodium(iii)-catalyzed coupling of anilines with α-diazoesters via chelation-assisted C–H activation

Ir(iii) catalysts can catalyze the efficient synthesis of indoles via C–H activation of anilines in the coupling with α-diazo β-ketoesters.

Iridium(iii)-catalyzed regioselective C7-sulfonamidation of indoles

Iridium(iii)-catalyzed direct C7-sulfonamidation of indoles with sulfonyl azides is described.

Rhodium-catalyzed C–H activation of 3-(indolin-1-yl)-3-oxopropanenitriles with diazo compounds and tandem cyclization leading to hydrogenated azepino[3,2,1-hi]indoles

Rh(iii)-Catalyzed C–H activation of 3-(indolin-1-yl)-3-oxopropanenitriles with diazo compounds and tandem cyclization leading to seven-membered ring scaffolds has been developed.

Cobalt-catalyzed synthesis of quinolines from the redox-neutral annulation of anilides and alkynes

A new method of cobalt-catalyzed annulation of anilides and internal alkynes for the efficient synthesis of quinoline scaffolds was developed.

Rhodium(iii)-catalyzed C–C coupling of 7-azaindoles with vinyl acetates and allyl acetates

The behaviour of electron-rich alkenes with 7-azaindoles in rhodium(iii)-catalyzed C–H activation is investigated.

RhI/RhIII catalyst-controlled divergent aryl/heteroaryl C-H bond functionalization of picolinamides with alkynes

The ability to establish switchable site-selectivity through catalyst control in the direct functionalization of molecules that contain distinct C-H bonds remains a demanding challenge that would enable the construction of diverse scaffolds from the same starting materials. Herein we describe the realization of this goal, namely a divergent heteroaryl/aryl C-H functionalization of aromatic picolinamide derivatives, targeting two distinct C-H sites, either at the pyridine ring or at the arene unit, to afford isoquinoline or ortho-olefinated benzylamine (or phenethylamine) derivatives. This complementary reactivity has been achieved on the basis of a RhIII/RhI switch in the catalyst, resulting in different mechanistic outcomes. Notably, a series of experimental and DFT mechanistic studies revealed important insights about the mechanism of the reaction and reasons behind the divergent regiochemical outcome.

Ruthenium-catalyzed cyclization of N-carbamoyl indolines with alkynes: an efficient route to pyrroloquinolinones

A regioselective synthesis of substituted pyrroloquinolinones by a ruthenium-catalyzed oxidative cyclization of substituted N-carbamoyl indolines with alkynes is described.

Metal-free TBHP-mediated oxidative ring openings of 2-arylimidazopyridines via regioselective cleavage of C–C and C–N bonds

A highly regioselective TBHP-mediated ring opening of imidazopyridinesviacleavage of C–C and C–N bonds has been realized for the first time to afford usefulN-(pyridin-2-yl)benzamides under mild conditions.