From transient sulfenic acids toward peculiar sulfurated molecules
作者:Anna Barattucci、Paola Bonaccorsi
DOI:10.1080/10426507.2016.1252373
日期:2017.2.1
contributions on the generation and use of transient sulfenicacids in the stereocontrolled synthesis of sulfoxides and disulfides. These substrates offer a wide range of synthetic opportunities such as the synthesis of sulfinyl dienes to be involved in stereoselective DA reactions, the preparation of libraries of bioactive sulfurated molecules, the synthesis of unsymmetrical disulfides and tripodal sulfoxides
图形摘要 摘要 亚磺酸 (R-SOH) 经常在生物和合成化学中充当反应性中间体。在大自然为我们提供的众多例子中,半胱氨酸衍生的次磺酸被认为是信号转导、转录调控事件和氧化应激反应的关键中间体。它们还在酶中发挥催化和结构作用。此外,亚磺酸的功能涉及硫代亚磺酸盐的生物合成,硫代亚磺酸盐赋予葱属物种特有的气味和风味,并参与切洋葱的催泪过程。另一方面,它们的 S-O 键的电子性质及其参与各种通常是立体有择的反应,促使次磺酸在有机合成中的许多应用,例如它们用作制备特殊硫化分子的关键中间体。本文旨在总结最近在亚砜和二硫化物立体控制合成中瞬态次磺酸的产生和使用方面的贡献。这些底物提供了广泛的合成机会,例如参与立体选择性 DA 反应的亚磺酰二烯的合成、生物活性硫化分子库的制备、不对称二硫化物和三足亚砜和二硫化物的合成。
Pyrimidine-derived disulfides as potential antimicrobial agents: synthesis and evaluation <i>in vitro</i>
Synthesis and biological evaluation of a new class of glycoconjugated disulfides that exhibit potential anticancer properties
作者:Paola Bonaccorsi、Francesca Marino-Merlo、Anna Barattucci、Gianluca Battaglia、Emanuela Papaianni、Teresa Papalia、Maria C. Aversa、Antonio Mastino
DOI:10.1016/j.bmc.2012.03.070
日期:2012.5
A synthetic strategy, based on the in situ generation of sulfenic acids and their thermolysis in the presence of thiols, was developed for obtaining a collection of polyvalent disulfides in which a benzene scaffold accommodates two or three flexible arms connecting saccharide moieties. Targeting carbohydrate metabolism or carbohydrate-binding proteins may constitute important approaches in the discovery process of new therapeutic anticancer agents. Therefore, a preliminary screening to ascertain the cytostatic/cytotoxic potential of this new class of enantiopure glycoconjugated disulfides has been conducted. Among them, products with two disulfide arms, harbouring galactose rings, induced high levels of apoptosis on U937 histiocytic lymphoma cells, but lower levels of cell death on peripheral blood mononuclear cells from healthy donors. Further experiments indicated that apoptosis induced by these glycoconjugated bis(disulfides) in U937 cells corresponds to the Bcl-2-sensitive, intrinsic form of apoptotic cell death. The bioinvestigation was extended to a panel of human cancer cell lines with different levels of malignancy and resistance to chemotherapeutic agents. Compounds under study proved to induce detectable levels of cell death towards all the tested cancer cell lines. (C) 2012 Elsevier Ltd. All rights reserved.