Total Synthesis of ( −)-Himalensine A

JacsTotal Synthesis of ( −)-Himalensine A: 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 man ipulations 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.

Source: Organometallic Current - November 28, 2017 Category: Chemistry Tags: Total synthesis Source Type: blogs