Palladium/Copper Bimetallic System-Mediated Cross-Coupling of Alkynes and Alkenes: Two Strategies to Suppress β-H Elimination on Alkyl-Palladium Center
作者:Liangbin Huang、Qian Wang、Wanqing Wu、Huanfeng Jiang
DOI:10.1002/adsc.201400007
日期:2014.6.16
efficient strategies to suppress β‐H elimination during the palladium/copper bimetallic system‐mediated cross‐coupling between alkynamides and alkenes. Remote donor groups with the terminal olefins, such as toluenesulfonamide, phosphate, sulfone, etc., cooperate with the amide of alkynamides and chelate the palladium active center, to promote C(sp3)O bond formation by suppressing the β‐H elimination
本文介绍了两种有效的策略来抑制炔/酰胺与烯烃之间的钯/铜双金属系统介导的交叉偶联过程中的β-H消除。带有末端烯烃的远端供体基团,例如甲苯磺酰胺,磷酸酯,砜等,与炔基酰胺的酰胺配合并螯合钯活性中心,通过抑制β-H的消除促进C(sp 3)O键的形成。另一个策略使用的降冰片烯的刚性结构,使中间没有顺-β-氢实现的C的还原消除 Cl键。