三乙基烷氧基硅烷醇解的平衡常数 K 在 20 °C 和 40 °C 下测定。一溴化碘用于促进与叔烷氧基相关的反应,而其他反应在碘存在下进行。具有乙氧基或丙氧基-伯、仲和叔烷氧基对的反应体系的K值分别为1或更高、约0.5和约0.05。这些值反映了烷氧基与硅的结合能力的程度,其顺序为一级>二级>三级烷氧基。假定反应的机理涉及碘或一溴化碘的参与。
Action des trialkylsilanes sur les aldehydes aliphatiques
作者:Rolland Bourhis、Emile Frainnet
DOI:10.1016/s0022-328x(00)89613-8
日期:1975.2
Two competing reactions ensue when trialkylsilanes HSiR′3 are treated with aliphatic aldehydes RCHO in the absence of a solvent and using a nickel catalyst (obtained by the treatment of anhydrous NiCl2 with a trialkylsilane); one gives an alcoxysilane RCH2OSiR′3, the other an ether oxide (RCH2)2O and a siloxane (R′3Si)2O. By variation of the reaction conditions, either reaction can be made exclusive
Hydrosilylation of epoxides catalyzed by a cationic η1-silane iridium(iii) complex
作者:Sehoon Park、Maurice Brookhart
DOI:10.1039/c0cc05714b
日期:——
Cationic silane complex 2, catalyzes the hydrosilylation of epoxides and cyclic ethers to give the silyl-protected alcohols, regioselectively. A mechanistic study shows that the epoxide undergoes isomerization to the ketone, followed by hydrosilylation.
Hydrosilylation of Carbonyl-Containing Substrates Catalyzed by an Electrophilic η<sup>1</sup>-Silane Iridium(III) Complex
作者:Sehoon Park、Maurice Brookhart
DOI:10.1021/om100818y
日期:2010.11.22
Hydrosilation of a variety of ketones and aldehydes using the cationic iridium catalyst, (POCOP)Ir(H)(acetone)(+), 1, (POCOP = 2,6-bis(di-tert-butyl phosphinito)phenyl) is reported. With triethyl silane, all but exceptionally bulky ketones undergo quantitative reactions employing 0.5 mol% catalyst in 20-30 min at 25 degrees C. Hydrosilation of esters and amides results in over-reduction and cleavage
Metal-Free Catalytic Reductive Cleavage of Enol Ethers
作者:Karina Chulsky、Roman Dobrovetsky
DOI:10.1021/acs.orglett.8b02932
日期:2018.11.2
In contrast to the well-known reductivecleavage of the alkyl–O bond, the cleavage of the alkenyl–O bond is much more challenging especially using metal-free approaches. Unexpectedly, alkenyl–O bonds were reductively cleaved when enol ethers were reacted with Et3SiH and a catalytic amount of B(C6F5)3. Supposedly, this reaction is the result of a B(C6F5)3-catalyzed tandem hydrosilylation reaction and
与众所周知的烷基-O键的还原裂解相反,烯基-O键的裂解更具挑战性,尤其是使用无金属方法时。出乎意料的是,当烯醇醚与Et 3 SiH和催化量的B(C 6 F 5)3反应时,烯基-O键被还原性裂解。据推测,该反应是B(C 6 F 5)3催化的串联氢化硅烷化反应和硅辅助的β-消除的结果。基于实验和密度泛函理论(DFT)计算,提出了这种裂解反应的机理。
PROTECTION OF ALCOHOLS AND ACIDS WITH ALLYLSILANES CATALYZED BY IODINE OR IODOTRIMETHYLSILANE IN CHLORINATED HYDROCARBON
作者:Akira Hosomi、Hideki Sakurai
DOI:10.1246/cl.1981.85
日期:1981.1.5
Many triorganosilyl ethers and esters were prepared by the reaction of allylsilanes with alcohols catalyzed by iodine or iodotrimethylsilane in excellent yields. Bromine and bromotrimethylsilane were also effective catalysts.