bis(trifluoroacetate) (Me3Si)2C(SiMe2O2CCF3)2, 8. The initial reaction involves solvolysis at the SiI bond to give HI and (Me3Si)2C(SiMe2C6H4Y)(SiMe2OCCF3), and the HI then cleaves the Si-aryl bond in the latter and in the starting material to give (Me3Si)C(SiMe2I)(SiMe2O2CCF3) and (Me3Si)2C(SiMe2I)2, which then undergo further solvolysis, with anchimeric assistance by γ-O2CCF3 or γ-I to leaving of I−. In the case of
碘化物(Me 3 Si)2 C(SiMe 2 C 6 H 4 Y)(SiMe 2 I)与YH,p -OMe和p- Cl在35°C下与
三氟乙酸反应生成二(
三氟乙酸盐)(ME 3 Si)的2 C(森达2 ö 2 CCF 3)2,8。初始反应包括在SiI键上进行溶剂分解,得到HI和(Me 3 Si)2 C(SiMe 2 C 6 H 4 Y)(SiMe 2 OCCF 3),然后HI裂解后者和起始材料中的Si-芳基键,得到(Me 3 Si)C(SiMe 2 I)(SiMe 2 O 2 CCF 3)和(Me 3 Si)2 C(森达2 I)2,其中然后通过γ-O经历进一步的溶剂分解,与邻位协助2 CCF 3或γ-I至离开第I - 。在
溴化物(Me 3 Si)2 C(SiMe 2 Ph)(SiMe 2 Br)发生相应反应的情况下,二
溴化物显然被视为中间体。根据以上所述,当Et存在3 N以中和HI(Me