Rhodium‐Catalyzed Asymmetric [2+2+2] Cycloaddition Reactions of 1,6‐Enynes and Oxabenzonorbornadienes
作者:Jianxiao Ni、Jingchao Chen、Yongyun Zhou、Gaowei Wang、Sida Li、Zhenxiu He、Weiqing Sun、Baomin Fan
DOI:10.1002/adsc.201900380
日期:2019.8.5
The asymmetric [2+2+2] cycloaddition reactions of 1,6‐enynes and oxabenzonorbornadienes was accomplished by using the complex of [Rh(COD)2]BF4 and (R)‐Xyl‐P‐Phos as chiral catalyst. A range of 1,6‐enynes and oxabenzonorbornadienes were well tolerated in the cycloaddition reaction, which afforded various polycyclic products with asymmetric quaternary carbon centers generally in excellent enantioselectivities
以[Rh(COD)2 ] BF 4和(R)-Xyl-P-Phos的配合物为手性催化剂,完成了1,6-烯和草酸苯并降冰片二烯的不对称[2 + 2 + 2]环加成反应。环加成反应对一系列1,6-炔和草酰苯并降冰片二烯具有良好的耐受性,这提供了具有不对称季碳中心的各种多环产物,通常具有出色的对映选择性。