Total Synthesis of Selaginpulvilin C and D Relying on <i>in Situ</i> Formation of Arynes and Their Hydrogenation
作者:Rajdip Karmakar、Daesung Lee
DOI:10.1021/acs.orglett.6b03241
日期:2016.12.2
total syntheses of selaginpulvilins C and D is described. The key strategy for the construction of the core fluorene moiety involves in situ formation of an aryne intermediate followed by its formal hydrogenation. The precursor tetraynes that undergo aromatization via hexadehydro Diels–Alderreaction were prepared from readily available building blocks through typical alkyne-coupling reactions.
An extremely concise total synthesis of a potent phosphodiesterase-4 inhibitory natural product, selaginpulvilin D, is reported. The synthesis features a one-pot, 3-fold electrophilic aromatic substitution sequence to assemble a 9,9-diarylfluorene core. The approach allows access to useful quantities of a selaginpulvilin natural product for the first time.
[EN] SELAGINELLA PULVINATA EXTRACTIVE AND PREPARATION METHOD AND APPLICATION THEREOF<br/>[FR] EXTRAIT DE SELAGINELLA PULVINATA. SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION<br/>[ZH] 一种垫状卷柏提取物及其制备方法和应用