From Acenaphthenes to (+)-Delavatine A: Visible-Light-Induced Ring Closure of Methyl (α-Naphthyl) Acrylates
作者:Theodor Peez、Jan-Niclas Luy、Klaus Harms、Ralf Tonner、Ulrich Koert
DOI:10.1002/chem.201804735
日期:2018.12.3
Disclosed herein is a visible light mediated cyclization of methyl (α‐naphthyl) acrylates and heteroaromatic analogues yielding substituted acenaphthenes and azaacenaphthenes. This highly functional‐group‐tolerant transformation was put to the test in an enantioselective formal synthesis of delavatine A. Mechanistic details were elucidated by DFT‐calculations revealing an unusual intramolecular H‐transfer
本文公开了可见光介导的丙烯酸(α-萘基)丙烯酸酯和杂芳族类似物的环化反应,产生取代的substituted啶和氮杂za啶。这种对官能团具有高度耐受性的转化被用于法拉第汀A的对映选择性正式合成中。通过DFT计算阐明了机理细节,揭示了伯胺介导的异常分子内H转移。这种转变的普遍性使得在晚期可以进行五元环空环合成的新颖合成策略,从而允许对萘化学的依赖直至of的构建。