Gold(I)-Catalyzed Polycyclization of Linear Dienediynes to Seven-Membered Ring-Containing Polycycles via Tandem Cyclopropanation/Cope Rearrangement/C–H Activation
作者:Pei-Jun Cai、Yi Wang、Cheng-Hang Liu、Zhi-Xiang Yu
DOI:10.1021/ol5028706
日期:2014.11.21
6-tricyclic ring systems in one step with high diastereocontrol. The polycyclization, a formal [4 + 3]/C–H activation reaction, takes place through gold(I)-catalyzed intramolecular cyclopropanation of diene with diyne, Cope rearrangement of cis-alkenylalkynylcyclopropane, aliphatic C–H activation via a seven-membered-ring allene intermediate, and [1,2]-H and -G (H or OAc) shifts.
一种新型的金(I)催化的容易制备的线性二烯二炔的多环化反应已被开发出来,用于一步合成具有高非对映控制性的5,7,6-三环稠合环系统。多环化是一种正式的[4 + 3] / CH活化反应,是通过金(I)催化的二烯与二炔的分子内环丙烷化,应对顺-烯基炔基环丙烷的重排,脂族CH-H的七元活化而发生的环烯丙基中间体,以及[1,2] -H和-G(H或OAc)移位。