Total Synthesis and Determination of the Absolute Configuration of Naturally Occurring Mangromicin A, with Potent Antitrypanosomal Activity
作者:Hirokazu Takada、Takeshi Yamada、Tomoyasu Hirose、Takuma Ishihara、Takuji Nakashima、Yo̅ko Takahashi、Satoshi O̅mura、Toshiaki Sunazuka
DOI:10.1021/acs.orglett.6b03512
日期:2017.1.6
An enantioselective total synthesis of (+)-mangromicin A has been accomplished. The tetrahydrofuran ring of mangromicin A, possessing a tetrasubstituted carbon center, was constructed by Mukaiyama-type vinylogous alkylation via a cyclic oxocarbenium intermediate derived from a γ-hydroxy ketone with ideal stereoselectivity, and the 4-hydroxydihydropyrone scaffold was generated via Dieckmann cyclization
(+)-mangromicin A的对映选择性全合成已完成。含有四取代碳中心的芒果素A的四氢呋喃环是通过Mukaiyama型乙烯基烷基化反应,通过具有理想立体选择性的衍生自γ-羟基酮的环状氧羰基中间体,通过Dieckmann环化反应生成4-羟基二氢吡喃酮骨架的。总合成的后期。(+)-mangromicin A的可靠不对称合成揭示了天然存在的mangromicin A的绝对构型。