Pd-catalyzed intramolecular C–H addition of indoles bearing cyanohydrin components at the C(3), C(2), and N(1) positions to nitriles is described. A wide range of functionalized partially saturated carbazoles, tetrahydropyrido[1,2-a]indole, and carbazoles can be prepared in good to excellent yields under the optimal conditions. In addition, fused polycyclic indoles with seven- or eight-membered rings
描述了钯催化分子内C–H加成腈在腈C(3),C(2)和N(1)位置上带有氰醇成分的第一个例子。可以在最佳条件下以良好或优异的收率制备各种官能化的部分饱和咔唑,四氢吡啶并[1,2- a ]吲哚和咔唑。另外,也可以平滑地形成具有七元或八元环的稠合多环吲哚。
The Michael Addition of Indoles to α,β-Unsaturated Ketones Catalyzed by CeCl<sub>3</sub>·7H<sub>2</sub>O−NaI Combination Supported on Silica Gel<sup>1</sup>
Alkylation of indoles by means of the Michaeladdition has been the subject of a number of investigation. It is well established that regioselectivity in the additions of indoles to electron-deficient alkenes is strongly controlled by the reaction medium. In a continuation of the work on developing greener and cleaner technologies, the cerium(III) chloride heptahydrate and sodium iodide combination
AbstractN‐Methyl indole reacts with but‐2‐yn‐1‐ol in the presence of PtCl2 in MeOH giving indole derivatives having a substituted 3‐oxobutyl group at the 3‐position in good yield. Under the reaction conditions, various substituted indoles and substituted propargyl alcohols are successfully involved in the reaction giving the corresponding addition products in good to moderate yields. The catalytic reaction can be further extended to N‐phenyl pyrrole. In the present multi‐step reaction, PtCl2 likely plays dual roles: as the catalyst for the rearrangement of propargyl alcohols to the corresponding alkenyl ketones and as the catalyst for the addition of indoles to the alkenyl ketones. Experimental evidence is provided to support the proposed mechanism.