convenient and facile method was developed for the synthesis of 1,2,3-trisubstituted indolines. Starting from indolederivatives and ketones/aldehydes, the corresponding indoline products could be obtained with high yield by the hexamethylphosphoramide (HMPA) catalyzed indole Friedel–Crafts reaction, reduction and direct reductive amination process.
Visible-Light-Induced Copper-Catalyzed Intermolecular Markovnikov Hydroamination of Alkenes
作者:Yang Xiong、Guozhu Zhang
DOI:10.1021/acs.orglett.9b02863
日期:2019.10.4
A visible-light-induced copper-catalyzedintermolecularhydroamination of alkenes using commercially accessible primary and secondary amines has been established. This effective method exhibits good tolerance of a broad range of functional groups and provides a facile access to an array of valuable amines with Markovnikov regioselectivity. The process can be positively expected to be used in bioactive
Brønsted Acid Catalyzed Monoalkylation of Anilines with Trichloroacetimidates
作者:Daniel R. Wallach、Patrick C. Stege、Jigisha P. Shah、John D. Chisholm
DOI:10.1021/jo5027222
日期:2015.2.6
under these conditions. Electron-poor anilines provide superior yields, with electron-rich anilines sometimes showing competitive Friedel–Craftsalkylation. A single flask protocol with formation of the imidate in situ is demonstrated, providing a convenient method for the direct substitution of alcohols with anilines. Reaction with a chiral imidate favors a mechanism that proceeds through a carbocation