Design, Synthesis and Structural Analysis of Glucocerebrosidase Imaging Agents
作者:Rhianna J. Rowland、Yurong Chen、Imogen Breen、Liang Wu、Wendy A. Offen、Thomas J. Beenakker、Qin Su、Adrianus M. C. H. Nieuwendijk、Johannes M. F. G. Aerts、Marta Artola、Herman S. Overkleeft、Gideon J. Davies
DOI:10.1002/chem.202102359
日期:2021.11.25
Tagged cyclophellitols offer a powerful activity-basedprobe (ABP) approach to the study of glycosidase activities. Here, a range of cyclophellitol epoxide and aziridine inhibitors and ABPs were synthesised and investigated on the 3D structure of human β-glucocerebrosidase (GBA), demonstrating their mechanism-based mode of action. We envisage these inactivators will serve useful in the study of GBA
标记的环酚为研究糖苷酶活性提供了一种强大的基于活性的探针 (ABP) 方法。在这里,合成了一系列环酚醇环氧化物和氮丙啶抑制剂和 ABP,并研究了人类 β-葡萄糖脑苷脂酶 (GBA) 的 3D 结构,证明了它们基于机制的作用模式。我们设想这些灭活剂将有助于研究与戈谢病相关的 GBA。
Synthetic studies on antibiotic validamycins. Part 12. Total synthesis of (+)-validamycin B and (+)-validoxylamine B
作者:Seiichiro Ogawa、Yasunobu Miyamoto、Taisuke Nose
DOI:10.1039/p19880002675
日期:——
The first complete synthesis of validamycin B (1a) and validoxylamine B (2a) is reported; coupling of the epoxide (12) and the partially protected derivative (16) of (+)-valienamine, followed by deprotection, gives (1a), which was identified from the 1H n.m.r. spectrum of its totally O-acetylated derivative (1b). Alternatively, coupling of the epoxide (24) with the amine (16) affords compound (25)
报告了有效霉素B(1a)和有效羟胺B(2a)的第一个完整合成;(+)-valienamine的环氧化物(12)与部分受保护的衍生物(16)偶联,然后脱保护,得到(1a),从其全部O-乙酰化衍生物(1b)的1 H nmr光谱中鉴定。或者,将环氧化物(24)与胺(16)偶合,得到化合物(25),其结构可通过将(25)转化为有效氧胺B壬酸-O-乙酸酯(2b)。将衍生自(25)的经过适当保护的胺(29)糖基化,然后脱保护和乙酰化,得到(1b)。
Stereocontrolled Synthesis of Ara-Type Cyclohexenyl Nucleosides
A highly stereocontrolled synthesis of a new class of carbocyclic nucleosides, ara-type cyclohexenylnucleosides, was developed. The key intermediate (+/-)-9 was obtained after a series of transformations starting from easily available endo-bicyclo carboxylic acid (+/-)-3. The allylic hydroxyl group of (+/-)-9 was masked via oxidation with manganese dioxide and released, after protection of the 2'-hydroxyl
A new synthesis of (+)-cyclophellitol, a potent β-glucosidase inhibitor, has been completed in nine steps from d-xylose. The key transformations involve a zinc-mediated fragmentation of benzyl-protected methyl 5-deoxy-5-iodo-xylofuranoside followed by a highly diastereoselective indium-mediated coupling with ethyl 4-bromocrotonate. Subsequent ring-closing olefin metathesis, ester reduction, olefin epoxidation
Synthetic Studies on the Validamycins. IX. Synthesis of Some Racemic Isomers of Validoxylamine A
作者:Tatsushi Toyokuni、Seiichiro Ogawa、Tetsuo Suami
DOI:10.1246/bcsj.56.2999
日期:1983.10
Two racemic isomers of validoxylamine A have been synthesized by use of coupling reactions of the protected DL-validamine and the allylbromides, the precursors of the unsaturated branched-chain cyclitol moiety. The racemic diastereomers thus formed can be separated by chromatography on silica gel. It indicates that optically pure validoxylamine A analogs should be obtained if chiral validamine derivative
通过使用受保护的 DL-validamine 和烯丙基溴(不饱和支链环醇部分的前体)的偶联反应,已合成了 validoxylamine A 的两种外消旋异构体。由此形成的外消旋非对映体可以通过硅胶色谱法分离。这表明如果使用手性有效胺衍生物代替外消旋物,应获得光学纯的有效木胺A类似物。