Synthesis of highly substituted fluorenones via metal-free TBHP-promoted oxidative cyclization of 2-(aminomethyl)biphenyls. Application to the total synthesis of nobilone
作者:Ilya A P Jourjine、Lukas Zeisel、Jürgen Krauß、Franz Bracher
DOI:10.3762/bjoc.17.181
日期:——
Highly substituted fluorenones are readily prepared in mostly fair to good yields via metal- and additive-free TBHP-promoted cross-dehydrogenative coupling (CDC) of readily accessible N-methyl-2-(aminomethyl)biphenyls and 2-(aminomethyl)biphenyls. This methodology is compatible with numerous functional groups (methoxy, cyano, nitro, chloro, and SEM and TBS-protective groups for phenols) and was further
通过不含金属和添加剂的 TBHP 促进的易于获得的N-甲基-2-(氨甲基)联苯和 2-(氨甲基)联苯的交叉脱氢偶联 (CDC),可以轻松制备高度取代的芴酮,收率基本上相当到良好。该方法与多种官能团(甲氧基、氰基、硝基、氯以及苯酚的 SEM 和 TBS 保护基团)兼容,并进一步用于天然产物诺比隆的首次全合成。