Asymmetric Total Synthesis of Senepodine F.

The first asymmetric total synthesis of the alkaloid senepodine F, which contains a decahydroquinoline ring (-ring) and a quinolizidine ring (-ring) connected by a methylene tether, has been achieved. The key steps of this synthesis include an organocatalytic asymmetric Diels-Alder reaction, a diastereoselective intramolecular -Michael reaction, and an intramolecular S2 cyclization to construct multisubstituted nitrogen-containing heterocycles. In addition, our total synthesis led to the stereochemical reassignment on the decahydroquinoline ring of senepodine F.