[EN] INHIBITORS OF PSEUDOMONAS AERUGINOSA LECB<br/>[FR] INHIBITEURS DE PSEUDOMONAS AERUGINOSA LECB
申请人:HELMHOLTZ-ZENTRUM FÜR INFEKTIONSFORSCHUNG GMBH
公开号:WO2016151066A1
公开(公告)日:2016-09-29
The present invention relates to compounds derived from deoxy fucose. These compounds are useful as lectin inhibitors, especially as inhibitors of LecB. The invention also relates to pharmaceutical compositions comprising these compounds. The invention further relates to therapeutic uses of these compounds, especially to the prophylaxis or treatment of infections involving Pseudomonas aeruginosa.
Catalytic osmylation of conjugated dienes: a one-pot stereoselective synthesis of polyols
作者:Christine Y. Park、B.Moon Kim、K.Barry Sharpless
DOI:10.1016/s0040-4039(00)74472-8
日期:1991.2
Conjugateddienes have been hydroxylated with catalytic amounts of osmium tetroxide. The reaction can be highly stereoselective depending on the nature of the terminal substituents, leading to polyols of predictable configurations.
Chemoselective conversion of biologically sourced polyols into chiral synthons
作者:Laura L. Adduci、Trandon A. Bender、Jennifer A. Dabrowski、Michel R. Gagné
DOI:10.1038/nchem.2277
日期:2015.7
conversion of biomass into useful chemicals has often focused on either complete deoxygenation or the production of high-volume platform chemicals. Here, we describe the chemoselective partial reduction of silyl-protected C6O6-derived polyols to produce a diverse set of oxygen-functionalized chiral synthons. The combination of B(C6F5)3 and a tertiary silane efficiently generates a reactive equivalent of an
原油目前提供世界上大部分能源,但它也是许多原料化学品的来源。用于将生物质转化为有用化学物质的方法学通常集中在完全脱氧或大批量平台化学物质的生产上。在这里,我们描述了甲硅烷基保护的C 6 O 6衍生的多元醇的化学选择性部分还原,以产生各种不同的氧官能化手性合成子。B(C的组合6 ˚F 5)3和叔硅烷有效地产生亲电甲硅烷鎓离子(R的反应性等价物3的Si +)和氢化物(H -) 还原剂。氧损失的机理不涉及脱水消除,因此避免了立体化学的消融。相邻基团的参与和环状中间体的形成是在这些反应中实现选择性的关键,并且在同时存在伯和仲C-O键的情况下,该机理可以进一步控制。该方法在一个或两个合成步骤中提供了许多C 6 O n合成子以及几种先前未描述的产物的高度改进的合成方法。
Modulating Electrostatic Interactions in Ion Pair Intermediates To Alter Site Selectivity in the C−O Deoxygenation of Sugars
作者:Jared M. Lowe、Bekah E. Bowers、Youngran Seo、Michel R. Gagné
DOI:10.1002/anie.202007415
日期:2020.9.21
oligosaccharides. Computational methods helped identify this non‐intuitive outcome in low dielectric solvents to non‐isotropic electrostatic enhancements in the key ion pair intermediates, which influence the reaction coordinate in the reactivity‐/selectivity‐determining step. Molecular‐level models for these effects have far‐reaching consequences in stereoselective ion pair catalysis.
The reaction of carbohydrates with triphenyl phosphite methiodide and related compounds
作者:N.K. Kochetkov、A.I. Usov
DOI:10.1016/s0040-4020(01)99352-4
日期:1963.1
related compounds are proposed as reagents for replacing hydroxyls of protected carbohydrates by halogen atoms. The ease of the substitution reaction depends on steric accessibility of the hydroxyl to an SN2 attack. Isopropylidene and benzylidene as well as ester protective groupings can migrate under the reaction conditions; possible mechanisms of these migrations are discussed. As a result, a new route
提出了亚磷酸三苯酯甲硫醇和相关化合物作为用卤素原子代替被保护的碳水化合物的羟基的试剂。取代反应的难易程度取决于羟基对S N 2攻击的空间可及性。异亚丙基和亚苄基以及酯保护基团可以在反应条件下迁移。讨论了这些迁移的可能机制。结果,已经开发了从部分甲基化或甲苯磺酸化的单糖开始的脱氧糖的新途径。