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A new metal-free tert-butyl hydroperoxide (TBHP)-mediated carbonyl C(sp2)–H oxidative alkynylation of aldehydes with ethynyl benziodoxolones (EBX) for the synthesis of ynones is described. This method is based on a carbonyl C(sp2)–H oxidative radical coupling process according to mechanistic studies, and provides a general route to the assembly of diverse ynones with a broad substrate scope and excellent functional-group compatibility. [ABSTRACT FROM AUTHOR]

We here describe a new copper-catalyzed oxidative coupling of acids with alkanes for the selective synthesis of allylic esters and alkylalkenes. This method achieves multiple dehydrogenation and esterification, representing a new unactivated C(sp3)–H oxidative esterification of acids with common alkanes. [ABSTRACT FROM AUTHOR]

DTBP (di-tert-butyl peroxide) is utilized to mediate oxidative 1,2-difunctionalization of activated alkenes with an aryl C(sp2)–H bond and a benzylic C(sp3)–H bond for the synthesis of functionalized oxindoles. This reaction is a new organomediated strategy for alkene difunctionalization facilitated by Lewis acids. [ABSTRACT FROM AUTHOR]