The addition of MeI to the ironacyl phosphorusylide Cp(CO)2FeC(O)CH PMe3 (I) gives the phosphonium salt [Cp(CO)2FeC(O)(Me)CHPMe3]I (II), which can be dehydrohalogenated with Me3PCH2 to the corresponding ylide Cp(CO)2FeC(O)(Me)CPPMe3 (III). III is thermally stable in the pure state, but rearranges irreversibly with the addition of a trace of Me3PCH2 to the thermodynamically favored isomer Cp(CO)2FeC(O)HCPEtMe2
在
铁酰
磷酰化CP(CO)2 F
EC(O)CH 3 PMe 3(I)中添加MeI得到gives盐[CP(CO)2 F
EC(O)(Me)CHPMe 3 ] I(II),可以跟我脱卤化氢3 PCH 2到相应的内鎓盐的CP(CO)2 F
EC(O)(Me)的CPPMe 3(III)。III是热纯态稳定,但不可逆地在加入我的轨迹的重新排列3 PCH 2到热力学有利的异构体的CP(CO)2 F
EC(O)HCPEtMe 2(IV)。建立了合理的重排机制,涉及CP(CO)的分子间转移2 F
EC(O) -基团互变异构叶立德我之间3 PCHMe和EtMe 2 PCH 2。它是由CP(CO)的简单反应证明了2 F
EC(O)(Me)的CPEt 3(V)与我3 PCH 2,得到定量我和Et 3 PCHMe。当CP(CO)2 F
EC(O)部分与氢原子结合时,涉及过渡
金属基团转移的第一个内鎓盐重排主要是由更好的电子稳定性引起的。