Catalyst-free sulfenylation of indoles with sulfinic esters in ethanol
作者:Xiuqin Yang、Yishu Bao、Zonghao Dai、Qingfa Zhou、Fulai Yang
DOI:10.1039/c8gc01764f
日期:——
A novel catalyst-free method for the synthesis of structurally diverse indole thioethers in moderate to excellent yields has been developed. In this reaction, sulfinic esters serve as newsulfur electrophiles.
NMR of terminal oxygen. 6—17O NMR of the SO ‘double bond’: Derivatives of arylsulphinic and arylsulphonic acids
作者:Hans Dahn、Vien Van Toan、My-Ngoc Ung-Truong
DOI:10.1002/mrc.1260290907
日期:1991.9
oxygen atoms in esters, anions and amides of substituted arenesulphinic acids and in esters and amides of substituted arenesulphonic acids were measured. The signals of the terminal O appear close to those of the bridge O. Compared with carbonyl O, terminal SO shows (a) a lower sensitivity to the electronic influences of geminal groups, (b) only a low sensitivity to arene ring substituents and (c) small
测量了取代芳烃磺酸的酯、阴离子和酰胺以及取代芳烃磺酸的酯和酰胺中末端氧原子的 17O NMR 谱。末端 O 的信号看起来接近桥 O 的信号。 与羰基 O 相比,末端 SO 显示 (a) 对孪晶基团的电子影响的敏感性较低,(b) 对芳烃环取代基的敏感性较低(c) 小的溶剂效应。根据 π 键特性讨论 C 键和 S 键 O 之间的差异。Dy3+ 与甲基芳烃亚磺酸盐中的 O 端发生络合。
NH4I/1,10-phenanthroline catalyzed direct sulfenylation of N-heteroarenes with ethyl arylsulfinates
作者:Lingjuan Chen、Jun Zhang、Yueting Wei、Zhen Yang、Ping Liu、Jie Zhang、Bin Dai
DOI:10.1016/j.tet.2019.130664
日期:2019.11
10-phenanthroline-catalyzed direct sulfenylation reactions was reported. In this reaction, heteroarenes such as indoles, and pyrroles serve as nucleophiles by installing a arylthio group at the C3 and C2 position of heterocycles, respectively. With readily accessible and free of unpleasant odor ethyl arylsulfinates as sulfur reagents, the metal-free-catalyzed direct sulfenylation of N-heteroarenes has been
据报道,通过NH 4 I / 1,10-菲咯啉催化的直接亚磺酰基化反应可有效合成N-杂环芳基硫化物。在该反应中,通过在杂环的C 3和C 2位置分别安装芳硫基,使杂芳烃如吲哚和吡咯成为亲核试剂。随着容易获得并且没有令人不愉快的气味的芳基亚磺酸乙酯作为硫试剂,已经开发了无金属催化的N-杂芳烃的直接亚磺酰基化。即使在克规模上,也以中等至优异的产率获得了3-芳硫基吲哚和2-芳硫基吡咯的衍生物。该反应对于广泛的底物是通用的,并且显示出对多种官能团的良好耐受性。