Stereoselective synthesis of the B/C/D ring systmes of aphidicolane and stemodane diterpenes
Abstract
Diastereoisomeric tricyclo[6.3.1.01,6]dodecane derivatives (3) and (4), which correspond to the B/C/D ring systems of aphidicolane and stemodane diterpenes, were selectively prepared from the common spirodienone (5) by means of facile regioselective C–C bond formation mediated by the neighbouring hydroxy group participation.