[2+2+1] Cycloadditions of Bis(dialkylamino)acetylenes with SiI<sub>2</sub>(Idip): Syntheses and Reactivity Studies of Unprecedented 2,3,4,5-Tetraamino-1 <i>H</i>-siloles
作者:Yury N. Lebedev、Ujjal Das、Oleg Chernov、Gregor Schnakenburg、Alexander C. Filippou
DOI:10.1002/chem.201403108
日期:2014.7.21
A novel method for the synthesis of 1H‐siloles is presented. It involves a [2+2+1] cycloaddition of the ynediamines R2NCCNR2 (R=Me, Et) with SiI2(Idip) (Idip=1,3‐bis(2,6‐diisopropylphenyl)imidazolin‐2‐ylidene) to afford the orange‐colored, highly water‐sensitive 1,1‐diiodo‐2,3,4,5‐tetraamino‐1H‐siloles SiI2C4(NR2)4} (1‐I: R=Me; 2‐I R=Et). Treatment of 2‐I with an excess of SiBr4 afforded after
提出了一种合成1 H-硅酮的新方法。它涉及到一个[2 + 2 + 1]的ynediamines的环加成- [R 2 Ñ CC NR 2用SII(R = Me中,ET)2(IDIP)(IDIP = 1,3-双(2,6-二异丙基苯基)咪唑啉-2-亚丙基),得到橙色,高度水敏感的1,1-二碘-2-2、3、4、5-四氨基-1 H-硅烷基SiI 2 C 4(NR 2)4 } (1‐I:R = Me; 2‐I R = Et)。的治疗2-I与过量SIBR的4后我得到/溴交换1,1-二溴-1- ħ-硅酮SiBr 2 C 4(NEt 2)4 }(2-Br)。1 H硅酮1–I,2–I和2–Br得到了充分表征,并通过单晶X射线衍射确定了它们的分子结构。这些化合物在二烯片段中具有略微扭曲的五元硅杂环戊-2,4-二烯环和双/单CC键交替特征。的反应2-I与N-杂环碳烯IME 4(IME 4= 1,3