Atmospheric Oxygen Mediated Radical Hydrothiolation of Alkenes
作者:Ruairí O. McCourt、Eoin M. Scanlan
DOI:10.1002/chem.202002542
日期:2020.12.4
hydrothiolation of alkenes (and alkyne) is reported. A variety of sulfur containing motifs including alkanethiols, thiophenols and thioacids undergo an atmospheric oxygen‐mediated radical hydrothiolation reaction with a plethora of alkenes in good yield with excellent functional group compatibility, typically with short reaction times to furnish a range of functionalized products. Biomolecules proved
Transition-metal-free, three-component trifluoromethylative heteroarylation of unactivated alkenes: Efficient access to β-trifluoromethylated quinoxalinones and preliminary antifungal evaluation against Magnaporthe grisea
作者:Zhuoxian Shao、Shaoyi Zhang、Yihan Chen、Yun-Lin Liu、Ri-Yuan Tang、Zhaodong Li
DOI:10.1016/j.tet.2020.131199
日期:2020.5
unactivated alkenes is presented by employing CF3SO2Na and quinoxalin-2(1H)-ones as coupling partners and PhI(OAc)2 as oxidant. This three-component radical domino reaction allows an efficient synthesis of valuable β-trifluoromethyl alkyl quinoxalinones derivatives in a single step in moderate to excellent yields under mild conditions. Mechanistic studies indicated the cascade radical addition pathway controlled
在此,通过使用CF 3 SO 2 Na和喹喔啉-2(1 H)-ones作为偶合配偶体和PhI(OAc)2作为氧化剂,给出了未活化烯烃的无过渡金属的三氟甲基化杂芳基化作用。这种三组分自由基多米诺骨牌反应可有效合成有价值的β-三氟甲基烷基喹喔啉酮衍生物,在温和的条件下,一步一步即可获得中等至优异的收率。机理研究表明,级联自由基加成途径受自由基极性控制。这种由三部分组成的策略可轻松提供具有合成和生物学意义的三氟甲基和喹喔啉酮类骨架,这已通过首次对稻瘟病菌的初步抗菌评估得到了证明。
Ruthenium-catalyzed formal sp<sup>3</sup> C–H activation of allylsilanes/esters with olefins: efficient access to functionalized 1,3-dienes
作者:Dattatraya H. Dethe、Nagabhushana C. Beeralingappa、Saikat Das、Appasaheb K. Nirpal
DOI:10.1039/d0sc06845d
日期:——
Ru-catalysed oxidative coupling of allylsilanes and allyl esters with activated olefins has been developed via isomerization followed by C(allyl)–H activation providing efficient access to stereodefined 1,3-dienes in excellent yields. Mild reaction conditions, less expensive catalysts, and excellent regio- and diastereoselectivity ensure universality of the reaction. In addition, the unique power of
[EN] SULFONAMIDES AND DERIVATIVES THEREOF THAT MODULATE THE ACTIVITY OF ENDOTHELIN<br/>[FR] SULFONAMIDES ET DERIVES DE CEUX-CI, MODULANT L'ACTIVITE DE L'ENDOTHELINE
申请人:TEXAS BIOTECHNOLOGY CORPORATION
公开号:WO1998013366A1
公开(公告)日:1998-04-02
(EN) Thienyl-, furyl- and pyrrolyl-sulfonamides, formulations of pharmaceutically acceptable salts thereof and methods for modulating or altering the activity of the endothelin family of peptides are provided. In particular, N-(isoxazolyl)thienylsulfonamides, N-(isoxazolyl)furylsulfonamides and N-(isoxazolyl)pyrrolylsulfonamides, formulations thereof and methods using these sulfonamides for inhibiting the binding of an endothelin peptide to an endothelin receptor by contacting the receptor with the sulfonamide are provided. Methods for treating endothelin-mediated disorders by administering effective amounts of one or more of these sulfonamides or prodrugs thereof that inhibit the activity of the endothelin are also provided.(FR) L'invention concerne des thiényl-, furyl- et pyrrolyl-sulfonamides, des formulations de sels pharmaceutiquement acceptables de ceux-ci et des procédés de modulation ou de modification de peptides de la famille de l'endothéline. Elle porte notamment sur des N-(isoxazolyl)thiénylsulfonamides, des N-(isoxazolyl)furylsulfonamides et des N-(isoxazolyl)pyrrolylsulfonamides, des formulations de ceux-ci et des procédés dans lesquels ces sulfonamides sont utilisés pour l'inhibition de la liaison d'un peptide d'endothéline à un récepteur de l'endothéline par la mise en contact du récepteur avec le sulfonamide. Elle se rapporte encore à des procédés de traitement de troubles dont l'endothéline est à l'origine, qui consistent à administrer des doses efficaces d'un ou plusieurs de ces sulfonamides ou promédicaments de ces derniers, qui inhibent l'activité de l'endothéline.
Sulfonamides and derivatives thereof that modulate the activity of endothelin
申请人:——
公开号:US20030208084A1
公开(公告)日:2003-11-06
Thienyl-, furyl- and pyrrolyl-sulfonamides, formulations of pharmaceutically-acceptable salts thereof and methods for modulating or altering the activity of the endothelin family of peptides are provided. In particular, N-(isoxazolyl)thienylsulfonamides, N-(isoxazolyl)furylsulfonamides and N-(isoxazolyl)pyrrolylsulfonamides, formulations thereof and methods using these sulfonamides for inhibiting the binding of an endothelin peptide to an endothelin receptor by contacting the receptor with the sulfonamide are provided. Methods for treating endothelin-mediated disorders by administering effective amounts of one or more of these sulfonamides or prodrugs thereof that inhibit the activity of endothelin are also provided.