traceless activation reagent, a general iridium-catalyzed asymmetrichydrogenation of isoquinolines and pyridines is developed with up to 99% ee. This method avoids tedious steps of installation and removal of the activating groups. The mechanism studies indicated that hydrogen halide generated in situ acted as an activator of isoquinolines and pyridines.
Ag(I)-Catalyzed Aminofluorination of Alkynes: Efficient Synthesis of 4-Fluoroisoquinolines and 4-Fluoropyrrolo[α]isoquinolines
作者:Tao Xu、Guosheng Liu
DOI:10.1021/ol3026507
日期:2012.11.2
A silver-catalyzedintramolecular oxidative aminofluorination of alkynes has been developed by using NFSI as a fluorinating reagent. This reaction represents an efficient method for the synthesis of various 4-fluoroisoquinolines and 4-fluoropyrrolo[α]isoquinolines.
Mechanistic Investigation on the Silver-Catalyzed Oxidative Intramolecular Aminofluorination of Alkynes
作者:Tao Xu、Yichen Wu、Zheliang Yuan、Hairong Guan、Guosheng Liu
DOI:10.1021/acs.organomet.6b00054
日期:2016.5.23
In this work, a mechanistic study of silver-catalyzed oxidative aminofluorination of alkynyl-imine has been carried out. Kinetic data support a reaction pathway involving fast amination of alkyne to mesoionic carbene silver complexes (MIC)(n)Ag(I) (n = 1 or 2). The rate-determining step of the reaction is the fluorination of the Ag species supported by a single MIC.