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.
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.
The C1-C15 unit of halichondrin B was synthesized starting from D-glucose via stereoselective construction of the B and A rings, which have 2, 6-trans- and 2, 6-cis-disubstituted tetrahydropyran rings, respectively. With the aid of MM2 calculations kinetically and thermodynamically controlled Michael reactions were successfully applied for the construction of the B and A rings, respectively.