The stereocontrolled total synthesis of (-)-O-methylpallidinine

[reaction: see text] The stereocontrolled total synthesis of (-)-O-methylpallidinine, a naturally occurring Morphinan alkaloid with a B/C-trans-hydrophenanthrene framework, has been achieved starting from the chiral bicyclo[3.2.1]octenone building block by employing a single-step dihydrophenanthrene formation reaction as the key step.