The stereocontrolled total synthesis of (-)-myriocin 1 is reported. Optically active epoxide 9 was converted from symmetrical cyclohexadiene 8, utilizing an enzymatic kinetic resolution. The three sequential stereogenic centers of 1 were constructed by a regioselective epoxide-opening reaction and a Hofmann rearrangement. Elongation of the side chain was efficiently accomplished by the Julia-Kocienski reaction. Published by Elsevier Ltd.
Ni-Catalyzed Enantioselective Intramolecular Mizoroki–Heck Reaction for the Synthesis of Phenanthridinone Derivatives
作者:Diana Rachii、Dana J. Caldwell、Yui Kosukegawa、Mary Sexton、Paul R. Rablen、William P. Malachowski
DOI:10.1021/acs.joc.3c00202
日期:2023.7.7
nickel-catalyzed Heck reactions. A wide range of substrates were demonstrated to work in good to excellent yields. Good enantioselectivity was demonstrated using a new synthesized chiral iQuinox-type bidentate ligand (L27). The sustainability, low price of nickel catalysts, and significantly faster reaction rate (1 h) versus that of a recently reported palladium-catalyzedreaction (20 h) make this process