Palladium-catalyzed aerobic oxidative aminocarbonylation and alkoxycarbonylation reactions with aryl hydrazines as coupling partners have been developed. The oxidative carbonylation of aryl hydrazines proceeded smoothly at atmospheric pressure CO, employing molecular oxygen as the terminal oxidant. The only byproducts were nitrogen gas and water for both reactions. Notably, no double carbonylation was detected. Furthermore, aryl–halogen bonds, which are normally reactive in conventional Pd-catalyzed carbonylation reactions, remained intact.

A palladium-catalyzed oxidative carbonylation of arylhydrazines and alkynes with balloon pressure CO/O2 to afford trisubstituted pyrazoles in a one-pot manner has been developed. The formation of trisubstituted pyrazoles involves a sequential C–N bond cleavage, carbonylation, Sonogashira coupling, Michael addition, and intramolecular condensation cyclization tandem process. An unprecedented oxidative Sonogashira-carbonylation reaction of arylhydrazine plays a key role for such a facile approach to pyrazoles.

Selective carbon–carbon and carbon–heteroatom bond cleavage was achieved in a one reaction system. With this strategy a novel Pd/Cu-catalyzed aerobic oxidative oxosulfonation of olefins with DMSO has been developed. Preliminary mechanistic investigations indicated that CO/O2 assisted the bond cleavage and the leaving groups from the starting materials were trapped by O2 and underwent a hydroxylation process.

A copper-catalyzed oxidative coupling between quinazoline 3-oxides and unactivated aldehydes was described. The reaction worked well for both aliphatic and aromatic aldehydes and produced not only the direct oxidative coupling ketones but also cyclic hydroxamic esters derived from quinazolines.

New green one-pot four-component reactions of thiourea, malononitrile halohydrocarbon, aldehydes and alkyl halide have been successfully developed in eco-friendly water solvent through available phase-transfer catalyst, to access high yields of 2-amino-3-cyano-4-aryl-6-sulfanepyrimidines.

Established herein is an efficient direct oxidative acylation of sulfoximines with methylarenes as an acyl donor. Electron-donating as well as -withdrawing groups on the methylarenes are tolerated and even steric demanding ortho substituents are compatible. Both coupling partners are used in their native form, thus obviating prior functionalization and activation.

A novel tunable regioselective synthesis of pyrazolo[3,4-d]pyrimidine derivatives via aza-Wittig/Ag(I) or base-promoted tandem reaction has been developed. This approach provides a simple and efficient way to construct pyrazolo[3,4-d]-pyrimidine derivatives under mild conditions.

Here the iron-catalyzed rapid synthesis of 4-amino-quinazoline via [3+2] cycloaddition reaction of quinazoline-3-oxides and carbodiimides followed by ring opening process had been described. This reaction process could be effectively shortened with microwave-assistant.

Selective carbon–carbon and carbon–heteroatom bond cleavage was achieved in a one reaction system. With this strategy a novel Pd/Cu-catalyzed aerobic oxidative oxosulfonation of olefins with DMSO has been developed. Preliminary mechanistic investigations indicated that CO/O2 assisted the bond cleavage and the leaving groups from the starting materials were trapped by O2 and underwent a hydroxylation process.

A copper-catalyzed oxidative coupling between quinazoline 3-oxides and unactivated aldehydes was described. The reaction worked well for both aliphatic and aromatic aldehydes and produced not only the direct oxidative coupling ketones but also cyclic hydroxamic esters derived from quinazolines.