Metal free and selective activation of one C-F bond in a bound CF3 group

Metal free and selective activation of one C-F bond in a bound CF3 group
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DOI:
10.1039/c3cc38669d
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发表时间:
2013-01-01
影响因子:
4.9
通讯作者:
Stalke, Dietmar
Stalke, Dietmar
中科院分区:
化学2区
文献类型:
--
作者:
Azhakar, Ramachandran;Roesky, Herbert W.;Stalke, Dietmar

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用N-杂环亚甲硅烷基[PhC(NtBu)(2)SiCl](1)和[CH{(C= CH 2)(CMe)(2,6-iPr(2)C(6)H(3)N)(2)}Si](2)(其中PhN=C(CF 3)(2))观察到CF 3基团的第一次无金属选择性C-F键活化。反应以1:1的摩尔比进行,得到单C-F键活化的产物3和4,其各自含有CF 2基团。这两种反应都是通过前所未有的选择性活化C-F键之一而不是形成含有三元SiNC环的[1+2]环加成产物来进行的。
The first metal free selective C-F bond activation of a CF3 group was observed with N-heterocyclic silylenes [PhC(NtBu)(2)SiCl] (1) and [CH{(C=CH2)(CMe)(2,6-iPr(2)C(6)H(3)N)(2)}Si] (2) with PhN=C(CF3)(2). The reaction proceeds in a 1 : 1 molar ratio to yield the mono C-F bond activated products 3 and 4 with each containing a CF2 group. Both the reactions proceed through an unprecedented selective activation of one of the C-F bonds rather than forming the [1+2] cycloaddition product containing the three-membered SiNC rings.