SILICON BASED DRUG CONJUGATES AND METHODS OF USING SAME
申请人:BlinkBio, Inc.
公开号:US20170202970A1
公开(公告)日:2017-07-20
Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.
Silicon α-Effect: A Systematic Experimental and Computational Study of the Hydrolysis of C<sub>α</sub>- and C<sub>γ</sub>-Functionalized Alkoxytriorganylsilanes of the Formula Type ROSiMe<sub>2</sub>(CH<sub>2</sub>)<sub><i>n</i></sub>X (R = Me, Et; <i>n</i> = 1, 3; X = Functional Group)
demonstrated that the silicon α-effect cannot be rationalized in terms of a special single effect. The reactivities observed rather result from a summation of different components, such as electronic and steric effects, pD dependence, and hydrogen bonds between the functional group (or even protonated functional group) and the alkoxy leaving group. Therefore, the term “silicon α-effect” should not be used furthermore
为了理解在式类型ROSiMe的α-硅烷中的Si-OC键的增强的反应性方面的硅α-效果2 CH 2 X相比类似的γ-硅烷ROSiMe 2(CH 2)3 X(R =我等; X =官能团),一个系统的实验和动力学和这样的化合物的水解的机制的计算研究进行。为了这个目的,一系列合适的模型化合物的合成和在CD研究了它们的水解动力学3 CN / d 2 o在碱性和酸性条件下,使用1H NMR光谱作为分析工具。为了获得有关反应机理的更多信息,实验研究得到了计算研究的补充。这些研究表明,硅α效应不能通过特殊的单一效应来合理化。观察到的反应性实际上是由不同成分的总和产生的,例如电子和空间效应,pD依赖性以及官能团(甚至是质子化的官能团)与烷氧基离去基团之间的氢键。因此,不应再使用术语“硅α-效应”来解释在有机基的α-或γ-位带有官能团的烷氧基有机基硅烷在硅原子上的水解反应性(所谓的α-或γ-硅烷)。
The Hydrolysis/Condensation Behaviour of Methacryloyloxyalkylfunctional Alkoxysilanes: Structure-Reactivity Relations
作者:Stefan Altmann、J�rgen Pfeiffer
DOI:10.1007/s00706-003-0615-y
日期:2003.8.1
chloromethylalkoxysilanes under phase transfer catalysis conditions. The compounds thus obtained show an exceptionally high degree of reactivity with regard to hydrolysis and condensation both under acidic as well as under basic conditions compared to the established 3-methacryloyloxypropyltrimethoxysilane. A mechanistic model for this high reactivity by intramolecular activation is discussed.