DMSO‐TsCl is developed for methylthiolation of various heteroarenes including pyrroles, furans, thiophenes and indoles under facile conditions. This protocol features scalable, general applicability of substrates and moderate to excellent yields. An acceptable mechanism is proposed, two of the key intermediates of proposed mechanism are detected by HRMS. Further applications of this method were also
A thioether-directed Rh(III)-catalyzed C4 selective C–H alkenylation of indoles via the formation of 5-membered metallacycle intermediates is reported. This protocol allows a wide functional group compatibility and broad substrate scope. The directing group can be readily removed or transformed into other functional groups after the C–H functionalization event. The catalytic method is also applicable
据报道通过五元金属环中间体形成硫醚导向的Rh(III)催化的吲哚的C4选择性C–H链烯基化。该协议允许广泛的官能团兼容性和广泛的底物范围。在C–H官能化事件发生后,可以很容易地将导向基团除去或转化成其他官能团。该催化方法也适用于涉及苯并[ b ]噻吩和苯并[ b ]呋喃骨架的相关杂环体系。
Iridium‐Catalyzed Direct C4‐ and C7‐Selective Alkynylation of Indoles Using Sulfur‐Directing Groups
past century, and extensive studies have been conducted to establish practical synthetic methods for their derivatives. In particular, selective functionalization of the poorly reactive benzenoid core over the pyrrole ring has been a great challenge. Reported herein is an iridium‐catalyzed direct alkynylation of the indole C4‐ and C7‐positions with the assistance of sulfur directing groups. This transformation
Acid-catalysed isomerization of indol-3-yl sulphides to indol-2-yl sulphides: unexpected intermolecular nature of the rearrangement
作者:Pierre Hamel、Yves Girard、Joseph G. Atkinson
DOI:10.1039/c39890000063
日期:——
The rearrangement of indol-3-ylsulphides (1) to indol-2-ylsulphides (4), catalysed by proton acids, unexpectedly proceeds by an intermolecualr mechanism involving initial disproportionation to an indole-2,3-diyl bis-sulphide (2) and an indole (3), followed by a reaction between (2) and (3) to yield the rearranged product (4).