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。
Tripodal tris-disulfides as capping agents for a controlled mixed functionalization of gold nanoparticles
作者:Giovanna De Luca、Paola Bonaccorsi、Valentina Trovato、Aurora Mancuso、Teresa Papalia、Alessandro Pistone、Maria Pia Casaletto、Alessio Mezzi、Bruno Brunetti、Lucio Minuti、Andrea Temperini、Anna Barattucci、Maria Rosaria Plutino
DOI:10.1039/c8nj03086c
日期:——
New tris(SS)-tripodal capping ligands afford AuNP surface composition fine control and SPR sensing for TNT-like explosives.
新的三(S-S)-三脚架封端配体可实现AuNP表面组成的精细控制,并用于类TNT炸药的SPR传感。
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.
Mono‐ and Trinuclear Tripodal Platinum(II) Chelated Complexes Containing a Pyridine/Sulfoxide Based Anchoring Framework
species 6a to a CD3CN solution of a platinum(II) complex of the type cis-[PtMe2(Me2SO)2] (Pt1) or trans-[PtMeCl(Me2SO)2] (Pt2), platinum(II) coordination and chelation occurred, as definitively indicated by a sharp change in the 1H NMR spectrum towards the final corresponding chelated platinum(II) species and free dimethyl sulfoxide. The prepared platinum(II) species contain one or three fragments of the
新的三足配体 2,4,6-triethyl-1,3,5-tris[1-(2-pyridinyl)ethenyl]sulfinylmethyl}benzos 6,其特征在于三个侧链,每个都含有亚砜和吡啶部分,合成自相应的次磺酸和2-乙炔基吡啶。获得并分离了两种非对映体混合物,一种外消旋混合物6a,具有C3对称轴,而另一种6b没有对称性。为了研究这些螯合-κN,κS型配体的配位能力,还合成了单支化外消旋[1-(2-吡啶基)乙烯基]亚磺酰基苯9。将等量的单螯合配体 9 或三足类物质 6a 添加到顺式-[PtMe2(Me2SO)2] (Pt1) 或反式-[PtMeCl(Me2SO) 类型的铂 (II) 络合物的 CD3CN 溶液中2] (Pt2), 铂 (II) 发生配位和螯合,正如 1H NMR 谱向最终相应的螯合铂 (II) 物质和游离二甲基亚砜的急剧变化所明确表明的那样。制备的铂 (II)
From Transient Sulfenic Acids to Disulfide-Functionalized Tripodal Structures
作者:Anna Barattucci、Maria Aversa、Paola Bonaccorsi
DOI:10.1055/s-0030-1259306
日期:2011.1
The condensation of transient polysulfenic acids with thiols, some of which containing privileged structures, has been applied to the synthesis of tripodal disulfides. The easy access to this new kind of conformationally constrained polyfunctionalized compounds opens the way to their application in supramolecular chemistry.