An effective and simple visible light-induced heterogeneous g-C 3 N 4 -catalyzed decarboxylative reaction of quinoxalin-2(1H)-ones with Naryl glycines was developed. When the reaction was performed in DMSO/ H 2 O and EtOH, the products dihydroquinoxalin-2(1H)-ones and tetrahydroimidazo[1,5-a]quinoxalin-4(5H)-ones were unprecedentedly obtained in good yields, respectively. This solvent-dependent system offers advantages, including simple and easy operation, short reaction time, high chemoselectivity, a recyclable catalyst, metal-/base-/oxidant-free, and mild reaction conditions.

A feasible arylaminomethyl radical-triggered tandem annulation reaction has been developed toward a large variety of poly fused heterocycles, tetrahydroimidazo-[1,5-a]quinoxalin-4(5H)-ones, by reacting diverse quinoxalin-2(1H)-ones with various N-arylglycines in green solvent (DMC) in the presence of CsPbBr 3 under white-light irradiation conditions.

Radical cascade cyclization of β,γ‐unsaturated hydrazones/oximes has recently emerged as an efficient and powerful protocol for the construction of diverse and valuable functionalized pyrazolines and isoxazolines. In this review, three catalytic ways of radical cascade cyclization of β,γ‐unsaturated hydrazones/oximes are summarized and classified; these are transition‐metal‐catalyzed systems, transition‐metal‐free systems, and photo‐/electrocatalytic systems, respectively. Through these methods, various functional groups are installed on the pyrazoline and isoxazoline skeletons to enrich the small organic molecule library.

A photocatalytic strategy for the controllable aroylation or diaroylation of allyl sulfones was established by using tetrabutylammonium decatungstate (TBADT) as hydrogen atom transfer (HAT) photocatalyst and aldehydes as radical precursors....

A convenient radical cascade cyclization of aniline-linked 1,7-enynes with 1,3-dicarbonyl compounds was developed to synthesize cyclopenta [c]quinolines in the presence of AgNO 3 /K 2 S 2 O 8 . A wide range of cyclopenta[c]quinolines were prepared in moderate to excellent yields.

A tetrabutylammonium decatungstate (TBADT)-photocatalyzed direct coupling of inert alkanes and quinoxalin-2(1H)-ones with H2 evolution was developed at room temperature. The present transformation achieved the direct C(sp3)-H/C(sp2)-H coupling under noble metal-free,...

A visible‐light‐induced dioxygenation of β,γ‐unsaturated oximes for the synthesis of diverse useful isoxazolines bearing a hydroxyl moiety was developed by employing graphitic carbon nitride (g‐C3N4) as a heterogeneous photocatalyst under an air atmosphere. Noted that, the eminent advantages of this metal‐free protocol include step economy, easy operation, a recyclable photocatalyst, external reductant‐/oxidant‐free and mild reaction conditions. Additionally, mechanistic studies indicated hydroxyl radical was generated under the photocatalysis of g‐C3N4.

An efficient and convenient silver-catalyzed procedure was developed for the synthesis of various phosphoryl-substituted benzimidazo[2,1-a]isoquinoline-6(5H)-ones from diarylphosphine oxides and 2-arylbenzoimidazoles. Moreover, the phosphoryl-substituted indolo [2,1-a]isoquinolin-6(5H)-ones could also be achieved by using this strategy under mild reaction conditions in the presence of AgNO 3 /K 2 S 2 O 8 .