基于我们先前发现的小分子抑制剂皂苷1,已经设计,合成和评估了一系列3 - O -β-木糖醇齐墩果酸类似物作为H5N1进入抑制剂。对化合物1糖苷配基的详细结构-活性关系(SARs)研究表明,齐墩果酸作为糖苷配基的微妙修饰对抗病毒活性具有关键影响。这些结果表明,在OA的17-COOH处引入双取代酰胺结构或将OA的C-3构型从3β转变为3α形式均可显着提高选择性指数,同时保持其体外抗病毒活性。化合物8由于其出色的抑制活性和良好的选择指数,因此被选择用于进一步的机理研究。分子模拟研究和表面等离子体共振分析证实,化合物8通过与氨基酸残基LYS-26,ASN-53,ASN-27和ASN-50结合,稳定了血凝素(HA)的HA2亚基,因此可以防止HA进行构象重排,这是病毒进入的关键步骤。
[EN] C17-ALKANEDIYL AND ALKENEDIYL DERIVATIVES OF OLEANOLIC ACID AND METHODS OF USE THEREOF [FR] DÉRIVÉS C17-ALCANEDIYLÉS ET ALCÈNEDIYLÉS DE L'ACIDE OLÉANOLIQUE ET LEURS PROCÉDÉS D'UTILISATION
The development of 1,5-dimethyl-9-azanoradamantane N-oxyl (DMN-AZADO; 1,5-dimethyl-Nor-AZADO, 2) as an efficient catalyst for the selective oxidation of primary alcohols in the presence of secondary alcohols is described. The compact and rigid structure of the azanoradamantane nucleus confers potent catalytic ability to DMN-AZADO (2). A variety of hindered primary alcohols such as neopentyl primary
9-azanoradamantane N—oxyl compound and method for producing same, and organic oxidation catalyst and method for oxidizing alcohols using 9-azanoradamantane N—oxyl compound
申请人:TOHOKU UNIVERSITY
公开号:US09114390B2
公开(公告)日:2015-08-25
An organocatalyst for oxidizing alcohols in which a primary alcohol is selectively oxidized in a polyol substrate having a plurality of alcohols under environmentally-friendly conditions. The organic oxidation catalyst has an oxygen atom bonded to a nitrogen atom of an azanoradamantane skeleton and at least one alkyl group at positions 1 and 5. The oxidation catalyst has higher activity than TEMPO, which is an existing oxidation catalyst, in the selective oxidation reaction of primary alcohols, and better selectivity than AZADO and 1-Me-AZADO. This DMN-AZADO can be applied to the selective oxidation reaction of primary alcohols that contributes to shortening the synthesizing process for pharmaceuticals, pharmaceutical raw materials, agricultural chemicals, cosmetics, organic materials, and other such high value-added organic compounds.
Differentiation- and Apoptosis-Inducing Activities by Pentacyclic Triterpenes on a Mouse Melanoma Cell Line
作者:Keishi Hata、Kazuyuki Hori、Saori Takahashi
DOI:10.1021/np0104673
日期:2002.5.1
pentacyclic triterpenes, several lupane, oleanane, and ursane triterpenes were prepared and their effects on B16 2F2 melanoma cell differentiation and growth were examined. Eleven lupanetriterpenes used in this study acted on the melanoma cells as a melanogen, but no induction of melanogenesis of B16 2F2 cells by oleanane and ursane was detected. The differences at C-17 of the lupaneseries and acetylation
[EN] COMPOSITIONS COMPRISING TRITERPENOIDS AND USES THEREOF FOR TREATING OPTIC NEUROPATHY<br/>[FR] COMPOSITIONS COMPRENANT DES TRITERPÉNOÏDES ET LEURS UTILISATIONS POUR TRAITER UNE NEUROPATHIE OPTIQUE
申请人:REGENERA PHARMA LTD
公开号:WO2018047175A1
公开(公告)日:2018-03-15
The invention relates to compositions and formulations comprising at least one triterpenoic acid and at least one neutral triterpenoid and uses thereof for treating optic neuropathy conditions.
[EN] COMPOSITIONS COMPRISING TRITERPENOIDS<br/>[FR] COMPOSITIONS COMPRENANT DES TRITERPÉNOÏDES
申请人:REGENERA PHARMA LTD
公开号:WO2017051423A1
公开(公告)日:2017-03-30
The invention relates to compositions and formulations comprising at least one triterpenoic acid and at least one neutral triterpenoid and uses thereof for treating for use in treating a condition selected from Alzheimer's disease (AD), Parkinson's Diseases (PD) and vascular dementia (VD).