在浓溶液中随着六氧化二碳的逸出,六(2,4-二炔),八(2,4-二炔)和八(2,4,6-三炔)(R [CC ] n ·CHO)二聚,得到类型R [C C] n – 1 ·CH C(CHO)·[C C] n R;高于100°时,甚至苯基炔丙基醛也会发生类似反应。“二聚体”的两个几何异构体均被检测并表征。
The Pd-catalysed hydromethoxycarbonylation of aliphatic internal alkenes with minimal double bond isomerisation
作者:Tyler Bredenkamp、Cedric Holzapfel
DOI:10.1016/j.catcom.2017.04.006
日期:2017.6
The methoxycarbonylation of internal alkenes by a palladium(II)complex comprising PdCl2, bis(2-methoxyphenyl)phenylphosphine (2) and HCl has been investigated. The results presented herein demonstrate a non-isomerizing Pd-complex for the effective production of internal esters from the corresponding internal aliphaticalkenes. Selectivities of > 70% were obtained for the desired internal esters with