我们报告了一种通过芳烃加氢将易得的甲硅烷基化芳烃转化为甲硅烷基化饱和碳和杂环的方法。范围包括烷氧基和卤代甲硅烷基取代基。甲硅烷基可被衍生为多种功能,并在有机合成,材料科学以及制药,农业化学和香料研究中得到应用。但是,目前的技术很难获得甲硅烷基化的饱和(杂)循环。氢化的产率取决于硅胶添加剂的量。这种二氧化硅效应还可以显着改善以前公开的高度氟化芳烃的氢化方法(例如,氢化至全顺式C 6 H 6 F 6)。
Catalytic Synthesis of Functional Silicon-Stereogenic Silanes through<i>Candida antarctica</i>Lipase B Catalyzed Remote Desymmetrization of Silicon-Centered Diols
A series of silicon-containing diols are synthesized and used in lipase-catalyzed remote desymmetrization. This synthetic method is valuable in the construction of optically active silicon-stereogenic organosiliconcompounds. Good enantioselectivities of the remote desymmetrization was achieved with Candida antarctica lipase B (CAL-B) (up to 90:10er).
一系列含硅二醇被合成并用于脂肪酶催化的远程去对称化。这种合成方法在构建光学活性硅-立体有机硅化合物方面很有价值。使用南极念珠菌脂肪酶 B (CAL-B)(高达 90:10er)实现了远程去对称化的良好对映选择性。
Synthesis of Cyclic Peroxides Containing the Si-<i>gem</i>-bisperoxide Fragment. 1,2,4,5,7,8-Hexaoxa-3-silonanes as a New Class of Peroxides
作者:Alexander O. Terent'ev、Maxim M. Platonov、Anna I. Tursina、Vladimir V. Chernyshev、Gennady I. Nikishin
DOI:10.1021/jo7027213
日期:2008.4.1
A method was developed for the synthesis of the previously unknown class of organic peroxides, 1,2,4,5,7,8-hexaoxa-3-silonanes, based on the reaction of dialkyldichlorosilanes with 1,1‘-dihydroperoxyperoxides. 1,2,4,5,7,8-Hexaoxa-3-silonanes are rather stable under ambient conditions and were characterized by NMR spectroscopy, X-ray diffraction, and elemental analysis. Their yields are in a range of
A cyclic manipulation of peanut cage isomers has been achieved via anion exchange and unusual cage isomerism.
通过阴离子交换和异常的笼形异构性已经实现了花生笼形异构体的循环操作。
Construction of Axial Chirality and Silicon-Stereogenic Center via Rh-Catalyzed Asymmetric Ring-Opening of Silafluorenes
作者:Xiufen Bi、Jia Feng、Xiaoping Xue、Zhenhua Gu
DOI:10.1021/acs.orglett.1c00935
日期:2021.4.16
A rhodium-catalyzedenantioselectivering-opening/acylation of silafluorenes is reported. The newly developed bulky phosphoramidite ligand, in combination with methanol as the additive, enabled the reaction to create one axial chirality and one silicon-stereogenic center in a highly selective manner by only cleavage of one Si–C bond.
Hydrosilylation of cyclohexene, 1-methylcyclohexene, and isopropylidenecyclohexane
作者:O. G. Yarosh、L. V. Zhilitskaya、N. K. Yarosh、A. I. Albanov、M. G. Voronkov
DOI:10.1007/s11176-005-0114-4
日期:2004.12
Hydrosilylation of cyclohexene and isopropylidenecyclohexane with chloro(methyl)silanes Me3−n SiHCln (n = 1–3) gives rise to cyclohexyl- and chloro(2-cyclohexylpropyl)methylsilanes. Hydrosilylation of 1-methylcyclohexene with chlorodimethylsilane (n = 1) occurs anomalously and involves double-bond migration to form a mixture of seven compounds: the cis and trans isomers of 2-, 3-, 4-chlorodimethyl(methylcyclohexyl)silanes and chlorodimethyl(cyclohexylmethyl)silane. Chlorodimethylsilane (n = 2) adds to 1-methylcyclohexene to form a mixture of the cis and trans isomers of dichloro(methyl)(2-methylcyclohexyl)silane and dichloro(cyclohexylmethyl)methylsilane. With trichlorosilane (n = 3), no other products than trichloro(cyclohexylmethyl)silane are formed. The hydrosilylation products were reacted with ethynylmagnesium bromide to synthesize the corresponding ethynyl derivatives.