Discovery of novel sulfonated small molecules that inhibit vascular tube formation
摘要:
Tumor-associated angiogenesis is a complex process that involves the interplay among several molecular players such as cell-surface heparan sulfate proteoglycans, vascular endothelial growth factors and their cognate receptors. PI-88, a highly sulfonated oligosaccharide, has been shown to have potent anti-angiogenic activity and is currently in clinical trials. However, one of the major drawbacks of large oligosaccharides such as PI-88 is that their synthesis often requires numerous complex synthetic steps. In this study, several novel polysulfonated small molecule carbohydrate mimetics, which can easily be synthesized in fewer steps, are identified as promising inhibitors of angiogenesis in an in vitro tube formation assay. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of Deuterated (<i>E</i>)-Alkene through Xanthate-Mediated Hydrogen–Deuterium Exchange Reactions
作者:Jiaming Li、Jian Li、Xiaoliang Ji、Runfa He、Yang Liu、Zebin Chen、Yubing Huang、Qiang Liu、Yibiao Li
DOI:10.1021/acs.orglett.1c02600
日期:2021.10.1
Herein we have developed a reversible hydrogen–deuteriumexchange reaction of nonactivated olefins. By using EtOCS2K as a mediator, the H/D exchange reaction was realized through repeated addition and elimination reactions, demonstrating reversible H/D exchange between ordinary olefins and deuterated olefins. Using the lowest cost D2O without precious metal catalysts and ligands, a broad spectrum of
在此,我们开发了非活化烯烃的可逆氢-氘交换反应。以EtOCS 2 K为介体,通过反复加成和消去反应实现H/D交换反应,证明了普通烯烃和氘化烯烃之间的H/D交换是可逆的。在没有贵金属催化剂和配体的情况下使用最低成本的 D 2 O,实现了广泛的官能团兼容性。