Synthesis of 9,10-Phenanthrenes via Palladium-Catalyzed Aryne Annulation by <i>o</i>-Halostyrenes and Formal Synthesis of (±)-Tylophorine
作者:Tuanli Yao、Haiming Zhang、Yanna Zhao
DOI:10.1021/acs.orglett.6b00558
日期:2016.6.3
A novel palladium-catalyzedannulation reaction of in situ generated arynes and o-halostyrenes has been developed. This methodology affords moderate to excellent yields of substituted phenanthrenes and is tolerant of a variety of functional groups such as nitrile, ester, amide, and ketone. This annulation chemistry has been successfully applied to the formal total synthesis of a biologically active