Synthesis of triptoquinone H and its C-5 epimer via efficient asymmetric dearomative cyclization
作者:Zhen Cao、Kang Du、Jianhui Liu、Wenjun Tang
DOI:10.1016/j.tet.2016.02.043
日期:2016.4
Enantioselective syntheses of triptoquinone H and its C-5 epimer were accomplished for the first time in seven linear steps and 33% overall yield from aldehyde 6 and Wittig salt 5 via a key palladium-catalyzed asymmetric dearomative cyclization. The P-chiral biaryl monophosphorus ligand AntPhos was proved to be efficient for the asymmetric dearomative cyclization to provide the tricyclic compound 8