TITANIUM (IV) COMPOUNDS AND METHODS OF FORMING HETEROCYCLIC COMPOUNDS USING SAME
申请人:REGENTS OF THE UNIVERSITY OF MINNESOTA
公开号:US20160200746A1
公开(公告)日:2016-07-14
The present disclosure provides Titanium (IV) compounds and methods of making heterocyclic compounds such as pyrroles using Titanium (IV) compounds. In certain embodiments, the Titanium (IV) compound is present in catalytic amounts.
Oxidative nitrene transfer from azides to alkynes <i>via</i> Ti(<scp>ii</scp>)/Ti(<scp>iv</scp>) redox catalysis: formal [2+2+1] synthesis of pyrroles
作者:Adam J. Pearce、Xin Yi See、Ian A. Tonks
DOI:10.1039/c8cc02623h
日期:——
Catalytic oxidative nitrene transfer from azides with the early transition metals is rare, and has not been observed without the support of redox noninnocent spectator ligands.
Bis(imido)vanadium(V)-Catalyzed [2+2+1] Coupling of Alkynes and Azobenzenes Giving Multisubstituted Pyrroles
作者:Kento Kawakita、Evan P. Beaumier、Yuya Kakiuchi、Hayato Tsurugi、Ian A. Tonks、Kazushi Mashima
DOI:10.1021/jacs.8b13390
日期:2019.3.13
[2+2+1] coupling reaction of alkynes and azobenzenes, giving multisubstituted pyrroles. A plausible reaction mechanism involves the generation of a mono(imido)vanadium(III) species as an initiation step, where 1a served as an imido source with concomitant release of 2 equiv of ClSiMe3, followed by a reaction with azobenzene to form a catalytically active bis(imido)vanadium(V) species via N═N bond cleavage