Total Synthesis of (-)-Himalensine A

J Am Chem Soc. 2017 Dec 13;139(49):17755-17758. doi: 10.1021/jacs.7b10956. Epub 2017 Nov 27.

Abstract

The first enantioselective synthesis of (-)-himalensine A has been achieved in 22 steps. The synthesis was enabled by a novel catalytic, enantioselective prototropic shift/furan Diels-Alder (IMDAF) cascade to construct the ACD tricyclic core. A reductive radical cyclization cascade was utilized to build the B ring, and end-game manipulations featuring a molecular oxygen mediated γ-CH oxidation, a Stetter cyclization to access the pendant cyclopentenone, and a highly chemoselective lactam reduction delivered the natural product target.

Publication types

  • Research Support, Non-U.S. Gov't