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Divergent Approach to the Bisanthraquinone Natural Products: Total Synthesis of (S)-Bisoranjidiol and Derivatives from Binaphtho-para-quinones

Author:
Podlesny, Erin E., Kozlowski, Marisa C.
Source:
Journal of organic chemistry 2013 v.78 no.2 pp. 466-476
ISSN:
1520-6904
Subject:
2-naphthol, anthraquinones, biomimetics, chemical bonding, chemical structure, dimerization, enantioselectivity, organic chemistry, oxidation, regioselectivity
Abstract:
The development of the first asymmetric synthesis of a chiral anthraquinone dimer is outlined, resulting in the first total synthesis of (S)-bisoranjidiol. Rather than a biomimetic dimerization retrosynthetic disconnection, the anthracenyl ring systems are generated after formation of the axially chiral binaphthalene framework. This synthetic strategy has enabled the synthesis of several analogues. Key features of the synthesis include the enantioselective coupling of a hindered 2-naphthol containing substitution peri to the site of C–C bond formation, the regioselective oxidation of 8,8′-hydroxylated binaphthols to binaphtho-para-quinones, and a tandem regioselective Diels–Alder/aromatization reaction.
Agid:
5500545