1-diphenylethylene; 1,1-diphenylallene; 1,1-diphenyl-1,3-butadiene; acenaphthylene; triethylvinylsilane; and triphenylvinylsilane. The sites of the resulting carbon—aluminum bonds in the adducts have been deduced by a combination of NMR spectroscopy, hydrolysis with D2O, oxidation and carbonation. Hydralumination of 1,1-diphenylethylene gave only the 1,1-diphenyl-2-aluminoethane adduct; 1,1-diphenylallene gave a
Aminosilanes as two-electron donors: A technological application of radical cation chemistry
作者:Ian R Gould、Stephen A Godleski、Paul A Zielinski、Samir Farid
DOI:10.1139/v03-073
日期:2003.6.1
sensitizers in silver halide photography. Here, we describe studies of the nucleophile-assisted cleavage reactions of the CSi bonds in their radical cations. Water is identified as a useful nucleophile. It is found that the kinetics of these reactions are best described by taking into account a radical cation water complex. The cleavage reactions are also controlled by steric effects at silicon and
氨基硅烷具有适当的结构特征,可用作卤化银摄影中的双电子敏化剂。在这里,我们描述了 C 12 Si 键在其自由基阳离子中的亲核辅助裂解反应的研究。水被确定为有用的亲核试剂。发现这些反应的动力学最好通过考虑自由基阳离子 ?? 水复合体。裂解反应也受硅的空间效应和羧酸盐基团的邻近性控制,该羧酸盐基团可以改变水的亲核性。裂解形成α-氨基自由基,可以向作为溶液相电子受体的9,10-二氰基蒽提供第二个电子。关键词:硅烷,自由基阳离子,双电子敏化,碎裂,空间效应。
Process for synthesis of silyl alcohols
申请人:Abbott Laboratories
公开号:US05113005A1
公开(公告)日:1992-05-12
Novel silyl alcohols having bulky substituents bonded to the silicon, and the silyl group attached to a carbon include the preferred 2-silyl-ethan-1-ols. A method for synthesizing silyl substituted alcohols include hydrosilation of a vinylic ester, especially vinyl acetate, followed by hydrolysis in mild base. The silyl alcohols are useful in preparing phosphorylating reagents for phosphorylating an oligonucleotide. The phosphorylated intermediate bearing the silyl group may be separated from failure product on the basis of bulky substituents on the silyl protecting group, which is later removed, e.g. by fluoride ion.
Silyl phosphorylating reagents and methods of using them
申请人:Abbott Laboratories
公开号:US05380835A1
公开(公告)日:1995-01-10
Oligonucleotide phosphorylating reagents wherein the silyl moiety has three bulky substituents, such as phenyl or t-butyl, and the silyl moiety is attached to the carbon of an ethanol group whose hydroxyl is an activated phosphate group. The preferred compound is 2-triphenylsilylethyl-2-cyanoethyl-N,N diisopropylaminophosphoramidite. The method of using this reagent to phosphorylate the 5'-OH of nucleosides and oligonucleotides is also disclosed. Nucleosides and nucleotides whose 5'-OH has been phosphorylated by the above reagent are also disclosed. The phosphorylated intermediate bearing the silyl group may be separated from failure product on the basis of bulky substituents on the silyl protecting group, which can be later removed by fluoride ion.
Novel silyl alcohols having bulky substituents bonded to the silicon, and the silyl group attached to a carbon include the preferred 2-silyl-ethan-1-ols. A method for synthesizing substituted alcohols include hydrosilation of a vinylic ester, especially vinyl acetate, followed by hydrolysis in mild base. The silyl alcohols are useful in preparing phosphorylating reagents for phosphorylating an oligonucleotide. The phosphorylated intermediate bearing the silyl group may be separated from failure product on the basis of bulky substituents on the silyl protecting group, which is later removed, e.g. by fluoride ion.