A transition-metal-free and base promoted C–C bond forming reaction of benzyl C(sp3)–H bond with organoammonium salts via C–N bondcleavage has been reported. Benzyl ammonium salts as well as cinnamyl ammonium salt could couple readily with various benzyl C(sp3)–H species, producing the corresponding products in moderate to excellent yields with good functional group tolerance. Late stage chemical
A Pd-catalyzed, site-selective p-hydroxypheny-loxylation of benzylic alpha-C(sp(3))-H bonds with 1,4-benzoquinone using thioamide as a directing group is reported. 1,4-Benzoquinone is employed as the p-hydroxyphenyloxy source without extra oxidants. This method exclusively gives site selectivity at alpha-C(sp(3))-H bonds rather than the usual beta-C(sp(3))-H bonds through C-H activation mode. The reactions proceed with high functional group tolerance in yields of 42-93%.