The Sonogashira coupling reaction of polymer‐supported propargylamine (=prop‐2‐yn‐1‐amine) with aryliodides in the presence of the [Pd(PPh3)2]Cl2/CuI catalyst system produces 3‐arylprop‐1‐yn‐1‐amines smoothly at room temperature (Scheme). When propargylamine is attached on Wang resin through a carbamate linker, the common problems with amino functionality in palladium‐catalyzed couplings are overcome
( ±)-rupestine A and ( ±)-rupestine J were prepared in a 13–14-step linear approach. This strategy started from 3-bromo-6-methylpicolinonitrile employing Krapcho decarboxylation, Suzuki cross-coupling, RCM reaction as key steps. The structure of rupestine A was reassigned via analyzing all enantiomers with electronic circular dichroism (ECD) spectroscopy and was further proved by synthesis of rupestine