A catalytic asymmetric entry to enantioenriched tertiary naphthoquinols via a facile tandem oxidation/ring-opening sequence
作者:Alice Kwan、Johanna Stein、Dora Carrico-Moniz
DOI:10.1016/j.tetlet.2011.04.020
日期:2011.7
The tertiary naphthoquinol is a key structural component of the antitumor natural products spiroxins A-E. Herein we report the first catalytic asymmetric approach to the tertiary naphthoquinol C4' stereogenic center present in the spiroxin framework, via tandem oxidation/ring-opening of a cyclic 3,4-epoxyalcohol. This new route allows a facile entry into relatively inaccessible tertiary naphthoquinols with high enantioselectivity and without the need of chiral auxiliaries. (C) 2011 Elsevier Ltd. All rights reserved.