Selective Hydrosilylation of Dienes, Enynes, and Diynes Catalyzed by a Platinum Complex with a Very Bulky NHC Ligand – The Crucial Role of Precise Tuning of the Reaction Conditions
作者:Patrycja Żak、Małgorzata Bołt、Cezary Pietraszuk
DOI:10.1002/ejic.201900217
日期:2019.5.26
Series of various dienes, diynes and enynes were hydrosilylated in the presence of platinum complex [Pt(IPr*OMe)(dvms)] (I) (where IPr*OMe=1,3‐bis2,6‐bis(diphenylmethyl)‐4‐methoxyphenyl}imidazol‐2‐ylidene, dvtms = divinyltetramethyldisiloxane) to afford selectively the corresponding mono‐ and bissilylated products in high yields. In each case, the process proceeded fully regioselectively according
在铂络合物[Pt(IPr * OMe)(dvms)](I)(其中IPr * OMe = 1,3-bis 2,6-bis(二苯甲基))存在的情况下,将各种二烯,二炔和烯炔系列进行氢硅烷化-4-甲氧基苯基}咪唑-2-亚烷基,dvtms =二乙烯基四甲基二硅氧烷),可以高收率选择性地提供相应的单甲硅烷基化和双甲硅烷基化产物。在每种情况下,该过程均根据反马尔可夫尼科夫规则完全区域选择性地进行。碳-碳三键的氢化硅烷化导致E异构体的排他性形成。首次对选定的1,3-烯炔和对称α,ω-进行单锅顺序氢化硅烷化还获得了具有两种不同硅烷的二烯。此外,采用了优化的反应条件,成功地将1,3-炔烃与仲硅烷进行了硅烷化反应,生成了具有末端碳-碳双键的立构规整多烯。