描述了一种新的协同镍还原催化和N,N-二甲基甲酰胺介导的策略,用于S- (三氟甲基)芳基硫代磺酸酯与烷基卤的 C S 自由基还原交叉偶联生产烷基芳基硫醚。该反应具有优异的选择性、广泛的功能耐受性、广泛的底物范围以及易于对生物相关分子进行后期修饰。机理研究认识到,通过用 Sn 热诱导 DMF还原,最初生成酰胺自由基阴离子,然后进行反极化还原和亲核磺酰基部分的单电子转移,形成巯基自由基并与 Ni 0 /Ni I /Ni III接合/Ni I催化循环。
[EN] COMPLEMENT MODULATORS AND RELATED METHODS<br/>[FR] MODULATEURS DU COMPLÉMENT ET PROCÉDÉS ASSOCIÉS
申请人:RA PHARMACEUTICALS INC
公开号:WO2020205501A1
公开(公告)日:2020-10-08
The present disclosure presents compounds and compositions that interact with complement components. Some compounds inhibit complement activity. Included are small molecule compounds and compositions that function as C5 inhibitor compounds. Methods for inhibiting complement activity and methods of treating complement-related indications with the C5 inhibitor compounds and compositions are provided.
Free radical-mediated alkylation of general alkenes is a challenging and largely unmet goal. Herein, we disclose a conceptually novel "polarity umpolung" strategy for radical alkylation of alkenes using a portfolio of easily-accessed, dual-function alkylating reagents. This is achieved by substituting inherently nucleophilic alkyl radicals with electrophilic sulfone-decorated surrogates, thus inverting
Deoxygenative trifluoromethylthiolation of carboxylic acids
作者:Runze Mao、Srikrishna Bera、Alexis Cheseaux、Xile Hu
DOI:10.1039/c9sc03396c
日期:——
Here we describe a deoxygenative trifluoromethylthiolation method that yields trifluoromethyl thioesters from readily available carboxylic acids. The method is built upon an "umpolung" strategy where triphenylphosphine is used to first activate an electrophilic trifluoromethylthiolating reagent and then serves as an oxygen acceptor for the deoxygenation. The method is mild, efficient, broad-scope,
Structure–Reactivity Relationship of Trifluoromethanesulfenates: Discovery of an Electrophilic Trifluoromethylthiolating Reagent
作者:Xinxin Shao、Chunfa Xu、Long Lu、Qilong Shen
DOI:10.1021/jo502645m
日期:2015.3.20
A family of electrophilic trifluoromethanesulfenates was prepared. Structure–reactivity relationship studies showed that the substituted groups on the aryl ring of the trifluoromethylthiolating reagent did not have an obvious influence on their reactivities. A simplified electrophilic trifluoromethylthiolating reagent 1c was then identified that can react with a wide range of nucleophiles such as Grignard
report the design and synthesis of hypervalent trifluoromethylthio-iodine(III) reagent 1 and the elucidation of its structure by NMR spectroscopy and X-ray crystallography. The trifluoromethylthiolation reactions of 1 with various nucleophiles were explored, and this compound was found to be a versatile electrophilicreagent for the transfer of a trifluoromethylthio group (-SCF3). The hydrogen-bonding