Stereoisomer library prepared via controlled radical polymerization: isolation, structural identification and discovery of stereospecific gelation behaviour of tri(N-phenyl acrylamide) [0.03%]
通过可控自由基聚合制备立体异构体库：三（N-苯基丙烯酰胺）的分离、结构鉴定及立体专一性凝胶行为研究
Yukiko Nagai,Hinako Iwamoto,Satoki Fukuda et al.
Yukiko Nagai et al.
The construction of stereoisomer libraries is essential for designing, maximizing, and tuning the biological, self-assembly, and photoelectromagnetic properties of optically active molecules. In this study, a stereoisomer library consisting...
Systematic synthesis of rare sugars and stereospecific conversion via photocatalysis [0.03%]
稀有糖的系统合成及光催化立体专一性转化
Pratiksha Babgonda Patil,Sho Usuki,Naoko Taki et al.
Pratiksha Babgonda Patil et al.
Rare sugars have gained attention as potential raw materials for pharmaceuticals and functional foods. Photocatalysis presents a promising approach for rare sugar synthesis due to its mild reaction conditions and environmental compatibility...
The carboxylate "gripper" of the substrate is critical for C-4 stereo-inversion by UDP-glucuronic acid 4-epimerase [0.03%]
底物的羧酸盐“抓取器”对于UDP葡萄糖醛酸4差向异构酶的C-4立体专一性转化是关键性的
Annika J E Borg,Laura De Cnop,Bernd Nidetzky
Annika J E Borg
UDP-glucuronic acid 4-epimerase (UGAepi) catalyzes the NAD+-dependent interconversion of UDP-glucuronic acid (UDP-GlcA) and UDP-galacturonic acid (UDP-GalA) through a mechanism involving C4-oxidation, 4-keto-intermediate rotation, and subse...
Immobilization of Cholesterol oxidases on functionalized Silica Nanoparticles for biotransformation of cholesterol and 7-ketocholesterol [0.03%]
基于功能化硅纳米粒子的胆固醇和7-酮胆固醇氧化酶固定化体系用于高效立体专一性合成estone及其同分异构体7-oxoestone
Shubhrima Ghosh,Razi Ahmad,Vikas Kumar Gautam et al.
Shubhrima Ghosh et al.
Cholesterol oxidation leads to the development of several oxysterols such as 7-ketocholesterol (7KC), which are linked to various age-related conditions. An approach to reduce their toxicity is proposed using enzymes from microbial sources ...
Large-Scale Syntheses of Silanoxy-Tetrahydrofurans via Stereospecific [5,5]-Rearrangements of Silanol Epoxides [0.03%]
通过硅醇环氧烷的立体专一性[5,5]重排实现大规模合成含硅氧烷四氢呋喃类化合物
Silver Raju,Shyam Sathyamoorthi
Silver Raju
Xiaoyu Zhang,Xiangyu Lu,Yajun Zou et al.
Xiaoyu Zhang et al.
In this study, a series of Z-enamide compounds were synthesized from α-amino ketones and alkynyl esters. Using triethylamine as the base catalyst, the reaction proceeded smoothly at room temperature to yield stereospecific products with hi...
Jiawei Sun,Jiayan He,Luca Massaro et al.
Jiawei Sun et al.
Free radicals were first discovered over 120 years ago by Gomberg1 and the first radical cross-couplings demonstrated by Kochi in the 1970's.2 In contrast to widely employed polar cross-coupling chemistry to forge C(sp2)-C(sp2) bonds (Suzuk...
Switchable and Stereospecific C- Glycosylation Strategy via Formal Functional Group Deletion [0.03%]
通过正式的功能团删除实现的可切换且立体选择性的C-苷化策略
Xiaoshen Ma,Stephen J Sujansky
Xiaoshen Ma
Carbohydrates constitute an important class of biologically relevant natural products. Among the synthetic glycomimetics, C-glycosides are particularly interesting due to their chemical and metabolic stability toward acidic and enzymatic hy...
Direct Observation of Alkyl Group Transmetalation from Boron to Copper: Impact of Structure Modification and the Critical Role of Copper-Oxygen Preassociation in Stereospecificity [0.03%]
烷基从硼到铜的转金属化直接观察：结构修饰的影响及铜-氧预缔合对立体专一性关键作用的研究
Hao Liang,James P Morken
Hao Liang
Mechanistic investigations of prospective intermediates in copper-catalyzed cross-coupling reactions with alkyllithium-activated alkylboronic esters are described. Complexes between (NHC)copper and the borate salts were characterized by X-r...
Design of Vinylboron Monomers for the Comprehensive Structural Control of Poly(vinyl alcohol)s via Stereospecific Controlled Radical Polymerization and Subsequent Side-Chain Replacement [0.03%]
通过立体专一性可控基团转移聚合及后续侧链置换对聚乙烯醇进行全面结构控制的乙烯基硼单体设计
Hiroshi Suzuki,Tsuyoshi Nishikawa,Makoto Ouchi
Hiroshi Suzuki
A series of vinylboron monomers was designed, wherein the boron atom is protected by N-alkyl-substituted anthranilamide moieties, in order to prepare poly(vinyl alcohol) (PVA) polymers via stereospecific RAFT polymerization and subsequent o...
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