Regioselection Switch in Nucleophilic Addition to Isoquinolinequinones: Mechanism and Origin of the Regioselectivity in the Total Synthesis of Ellipticine
作者:Joaquim A. M. Castro、Bruno K. Serikava、Christian R. S. Maior、Fabrício F. Naciuk、Silvana A. Rocco、Carolina B. P. Ligiéro、Nelson H. Morgon、Paulo C. M. L. Miranda
DOI:10.1021/acs.joc.1c02952
日期:2022.6.17
Ellipticine was synthesized in six steps and 20% global yield starting from the readily available 2,5-dimethoxy isoquinoline. Unprecedented regioselective control of the nucleophilic attack on the isoquinoline-5,8-dione is first described. Investigation of the possible pathways of this transformation through density functional theory calculations reveals unexpected N-oxide assistance in cascade tautomerizations