Systematic Strategy for the Synthesis of Cyanobacterin and Its Stereoisomers. 2. Asymmetric Total Synthesis of the 2- and 3-Epimers of Dechloro-cyanobacterin

Abstract

Stereocontrolled total syntheses of the (2S,3R)- and (2R,3S)-isomers of the non-chlorinated analog of cyanobacterin, a potent photosynthesis inhibitor, were achieved. Since both the (2R,3R)- and (2S,3S)-isomers of this compound had been previously synthesized from the same starting material, a systematic strategy for the synthesis of all stereoisomers could be established.

• cyanobacterin
• natural photosynthesis inhibitor
• synthesis of stereoisomers
• Evans and non-Evans aldol condensation
• diastereoselective alkynylation