The present invention relates to peptide conjugates of cytotoxins such as topoisomerase I inhibitors which are useful for the treatment of diseases such as cancer.
An oxorhenium complex bearing a chiral cyclohexane-1-olato-2-thiolato ligand: Synthesis, stereochemistry, and theoretical study of parity violation vibrational frequency shifts
In our effort towards measuring the parity violation energy difference between two enantiomers, a simple chiral oxorhenium complex 5 bearing enantiopure 2‐mercaptocyclohexan‐1‐ol has been prepared as a potential candidate species. Vibrational circular dichroism revealed a chiral environment surrounding the rhenium atom, even though the rhenium is not a stereogenic center itself, and enabled to assign
[EN] OLIGONUCLEOTIDE COMPOSITIONS AND METHODS THEREOF<br/>[FR] COMPOSITIONS D'OLIGONUCLÉOTIDES ET PROCÉDÉS ASSOCIÉS
申请人:WAVE LIFE SCIENCES LTD
公开号:WO2021237223A1
公开(公告)日:2021-11-25
The present disclosure provides modified oligonucleotides and compositions and methods thereof. In some embodiments, provided technologies comprise modified sugars and/or modified internucleotidic linkages. In some embodiments, the present disclosure provides technologies for preparing modified oligonucleotides. In some embodiments, the present disclosure provides chirally controlled oligonucleotide compositions and methods for their preparation and uses.
作者:Mattia Riccardo Monaco、Sébastien Prévost、Benjamin List
DOI:10.1021/ja510069w
日期:2014.12.10
The synthesis of enantiopure thiols is of significant interest for industrial and academic applications. However, direct asymmetric approaches to free thiols have previously been unknown. Here we describe a novel organocascade that is catalyzed by a confined chiral phosphoric acid and furnishes O-protected β-hydroxythiols with excellent enantioselectivities. The method relies on an asymmetric thiocarboxylysis
对映纯硫醇的合成对工业和学术应用具有重要意义。然而,以前不知道游离硫醇的直接不对称方法。在这里,我们描述了一种新型有机级联,它由受限的手性磷酸催化并提供具有优异对映选择性的 O 保护的 β-羟基硫醇。该方法依赖于内消旋环氧化物的不对称硫代羧化,然后是分子内酯交换反应。通过改变反应条件,还可以化学选择性和对映选择性地获得中间体硫酯。
Regio- and stereoselective ring-opening of epoxides using organic dithiophosphorus acids as nucleophiles
developed through the ring-opening of epoxides with organic dithiophosphorus acids 1. Highly regio- and stereoselective products, β-hydroxyalkyl dithiophosphates, which were transformed to the corresponding synthetically valuable β-hydroxymercaptans by further reduction, were obtained under mild reaction conditions without any catalyst or promoter. Highly enantioselective ring-openingreaction of cyclohexene