Fig. 2: C(sp²) & C(sp³)–H activation and retrosynthetic analysis of benzenoid cephalotane-type diterpenoids.

a Catellani reported a C(sp²)–H bond activation reaction. b Catellani reported C(sp³)–H bond activation reaction. c Retrosynthetic analysis of benzenoid cephalotane-type diterpenoids. FGI functional group interconversion.