Synthesis of benzo-fused lactams and lactones via Ru(<scp>ii</scp>)-catalyzed cycloaddition of amide- and ester-tethered α,ω-diynes with terminal alkynes: electronic directing effect of internal conjugated carbonyl group
作者:Yoshihiko Yamamoto、Keisuke Kinpara、Tomoaki Saigoku、Hisao Nishiyama、Kenji Itoh
DOI:10.1039/b402649g
日期:——
In the presence of a catalytic amount of Cp*RuCl(cod), 1,6- and 1,7-diynes connected by an amide or an ester tether underwent cycloaddition with terminal alkynes at room temperature to give rise to cycloadducts in 40â93% yields with 63 : 37â83 : 17 regioisomer ratios.
在一定量的 Cp*RuCl(cod) 催化剂存在下,通过酰胺或酯系链连接的 1,6- 和 1,7- 二炔在室温下与末端炔发生环化反应,生成产率为 40%â93% 的环化产物,其中 63 : 37â83 : 17 为异构体。