A General Palladium-Catalyzed Method for Alkylation of Heteroarenes Using Secondary and Tertiary Alkyl Halides

Palladium-catalyzed cross-coupling of enamides with sterically hindered α-bromocarbonyls

Palladium-catalyzed intermolecular alkylation of enamides with α-bromo carbonyls was developed. Under mild reaction conditions, various cyclic and acyclic enamides reacted well with α-bromo carbonyls to afford the corresponding multi-substituted alkene products in good yields. The coupling products could be converted into very useful γ-amino acid, δ-amino alcohol, 1,4-dicarbonyl and γ-lactam derivatives.

Oxidative coupling between C(sp2)–H and C(sp3)–H bonds of indoles and cyclic ethers/cycloalkanes

Cross-dehydrogenative-coupling (CDC) between C–H/C–H bonds of indoles and cyclic ethers/cycloalkanes is made viable through a simple transition-metal-free pathway.

Transformation of masked benzyl alcohols to o-aminobenzaldehydes through C–H activation: a facile approach to quinazolines

A decorating strategy has been developed for the synthesis of important synthetic units from benzyl alcohols through C–H functionalization.

Aerobic oxidative cyclization of benzamides via meta-selective C–H tert-alkylation: rapid entry to 7-alkylated isoquinolinediones

A novel copper-catalyzed aerobic oxidative cyclization of benzamides via meta-selective tert-alkylation using AIBN and analogues as radical precursors was described.

Palladium-catalyzed, ring-forming aromatic C-H alkylations with unactivated alkyl halides

A catalytic C-H alkylation using unactivated alkyl halides and a variety of arenes and heteroarenes is described. This ring-forming process is successful with a variety of unactivated primary and secondary alkyl halides, including those with β-hydrogens. In contrast to standard polar or radical cyclizations of aromatic systems, electronic activation of the substrate is not required. The mild, catalytic reaction conditions are highly functional group tolerant and facilitate access to a diverse range of synthetically and medicinally important carbocyclic and heterocyclic systems.

Metal-free C–N cross-coupling of electrophilic compounds and N-haloimides

When DBU is added, the cross-coupling reaction between alkyl halides (halogen = Cl, Br and I) and N-haloimides (halogen = Cl, Br) occurs, resulting in the formation of aminated products.