Synthesis, Structure, and Reactivity of Novel 3,4-Diphosphacyclobutenes Bearing Silyl Groups
作者:Shigekazu Ito、Hiromichi Jin、Shigeo Kimura、Masaaki Yoshifuji
DOI:10.1021/jo050195z
日期:2005.4.1
(E)-1,2-bis(phosphino)-1,2-bis(trimethylsilyl)ethene and (Z)-2,3-bis(trimethylsilyl)-1,4-diphosphabut-1-ene. The structures of the ring-opened products indicated E/Z isomerization around the CC bond after PP bond cleavage of 5, and the isomerization of the PCC skeleton. Ring opening of 1,2-bis(trimethylsilyl)-3,4-diphosphacyclobutenes affording (E,E)- and (Z,Z)-1,4-diphosphabuta-1,3-dienes was observed
的空间位铜介导的自偶联受阻2-(2,4,6-三-叔丁基苯基)-1-三烷基甲硅烷基-2- phosphaethenyllithiums得到1,2-双(三烷基甲硅烷基)-3,4- diphosphacyclobutenes(1,2- dihydrodiphosphetenes)通过正式的电环[2 + 2]在P环化ç ç P骨架以及2-三甲基甲硅烷基-1,4- diphosphabuta -1,3-二烯。还原1,2-双(三甲基甲硅烷基)-3,4-二磷酸环丁烯,然后用亲电试剂淬灭,得到开环产物,(E)-1,2-双(膦基)-1,2-双(三甲基甲硅烷基)乙烯和(Z)-2,3-双(三甲基甲硅烷基)-1,4-二磷丁-1-烯。开环产物的结构表明C周围E / Z异构化P键断裂5后的C键和P C C骨架的异构化。在去甲硅烷基化反应后,观察到1,2-双(三甲基甲硅烷基)-3,4-二磷环丁烯的开环,得到(E,E)-和(Z,Z)-1