Synthetic Studies of Halichondrin B, an Antitumor Polyether Macrolide Isolated from a Marine Sponge. 6. Synthesis of the C1-C15 Unit via Stereoselective Construction of the B and A Rings by Kinetically and Thermodynamically Controlled Michael Reactions with the Aid of Computational Search for Dominant Conformers.
Synthetic Studies of Halichondrin B, an Antitumor Polyether Macrolide Isolated from a Marine Sponge. 6. Synthesis of the C1-C15 Unit via Stereoselective Construction of the B and A Rings by Kinetically and Thermodynamically Controlled Michael Reactions with the Aid of Computational Search for Dominant Conformers.
PM3 calculations were carried out to study the origin of stereoselectivity in the intramolecular Michael reaction for a highly efficient construction of the B and A rings of halichondrin B.