Nickel-Catalyzed C–S Reductive Cross-Coupling of Alkyl Halides with Arylthiosilanes toward Alkyl Aryl Thioethers
作者:Yu-Zhong Yang、Yang Li、Gui-Fen Lv、De-Liang He、Jin-Heng Li
DOI:10.1021/acs.orglett.2c01954
日期:2022.7.22
A nickel-catalyzed C–S reductive cross-coupling of alkyl halides with arylthiosilanes for producing alkyl arylthioethers is developed. This reaction is initiated by umpolung transformations of arylthiosilanes followed by C–S reductive cross-coupling with alkyl halides to manage an electrophilic alkyl group onto the electrophilic sulfur atom and then construct a C(sp3)–S bond, and features exquisite
Nickel‐catalyzed umpolung C S radical reductive cross coupling of S‐(trifluoromethyl)arylsulfonothioates with alkyl halides
作者:Yu-Zhong Yang、Gui-Fen Lv、Ming Hu、Yang Li、Jin-Heng Li
DOI:10.1016/j.cclet.2023.108590
日期:2023.11
A new cooperative nickelreductive catalysis and N,N-dimethylformamide-mediated strategy for umpolung CS radical reductive cross coupling of S-(trifluoromethyl)arylsulfonothioates with alkyl halides to produce alkyl aryl thioethers is described. This reaction features excellent selectivity, wide functionality tolerance, broad substrate scope, and facile late-stage modification of biologically relevant
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。
Synthesis and Cycloaddition Reactions of 1-(Arylthio)-1,3-dienes. A Combined Experimental and Theoretical Study of Bicyclic Adducts Structures
A method giving simple access to various 1-(phenylthio)-4-substituted-1,3-dienes (5-10) is described. The influence of the different functionalizations introduced on the dienic systems has been tested in a set of classical [4 + 2] cycloaddition reactions. Both the endo/exo and regio selectivities have been investigated. While the endo compound is, as expected, the only or major isomer in all cases, the regio competition between sulfur and oxygen is in favor of the oxygen substituent in the case studied here, in contrast to related works. For one type of adduct, X-ray crystallographic analysis and NMR spectroscopy have been used in conjunction with ab initio and semiempirical AM1 calculations to determine the structure and conformations of products as well as the energetic pathway from the primary concave endo cycloadduct (28) to a rearranged bicyclic structure (39), The theoretical results fully support the occurrence of a photochemical [1,3] sigmatropic shift of the thiophenyl group.
DUHAMEL, L.;CHAUVIN, J.;MESSIER, A., J. CHEM. RES. MICROFICHE, 1982, N 2, 48-49
作者:DUHAMEL, L.、CHAUVIN, J.、MESSIER, A.
DOI:——
日期:——
Duhamel, Lucette; Chauvin, Joe; Messier, Angela, Journal of Chemical Research, Miniprint, 1982, # 2, p. 621 - 640