Ionic Hydrogenation with Organosilanes under Acid-Free Conditions. Synthesis of Ethers, Alkoxysilanes, Thioethers, and Cyclic Ethers via rganosilyl Iodide and Triflate Catalyzed Reductions of Carbonyl Compounds and Their Derivatives
作者:Mark B. Sassaman、G.K. Surya Prakash、George A. Olah、P. Donald、Katherine B. Loker
DOI:10.1016/s0040-4020(01)86635-7
日期:1988.1
The general ethersynthesis method based on the trialkylsilane/trialkylsilyl iodide or triflate reagent system has been extended to the syntheses of alkoxysilanes from ketones, tetrahydrofurans and tetrahydropyrans from dicarbonyl compounds, and thioethers by reductive cleavage of O-silylhemithioacetals.
Preparation of unsymmetrical disulfides by using sulfines
作者:Binne Zwanenburg、Piotr KieŁbasiński
DOI:10.1016/0040-4020(79)85022-x
日期:1979.1
Acidolytic cleavage of unsymmetrically substituted dithioacetal monoxides, ArCH(SR)S(O)Me has been used to prepare linear unsymmetrical disulfides RSSMe. Disproportionation was suppressed by the addition of a small amount of benzyl mercaptan. The required starting materials were conveniently obtained from appropriately substituted sulfines ArC(=SO)SR and methyl lithium. The following disulfides were
不对称取代的二硫代乙缩醛一氧化物ArCH(SR)S(O)Me的酸解裂解已用于制备线性不对称二硫化物RSSMe。通过添加少量的苄硫醇抑制歧化。所需的起始原料可方便地从适当取代的亚砜ArC(= SO)SR和甲基锂获得。制备以下二硫化物:R = nC 4 H 9(73.5%),nC 7 H 15(78%),Ph(77.3%),AcO(CH 2)10(81.5%)。