报道了几种用于钛催化氧化氮烯转移反应的原位生成催化剂体系的开发。最简单且应用广泛的催化剂体系TiCl 4 (THF) 2 /Zn 0可以在空气下安装在台式上。该系统使用市售试剂,可用作 Ti II /Ti IV多组分氧化还原反应的入口点,用于合成吡咯、α,γ-不饱和亚胺、α,β-不饱和亚胺、环丙亚胺和芳烃。
Ti-Catalyzed Multicomponent Oxidative Carboamination of Alkynes with Alkenes and Diazenes
作者:Zachary W. Davis-Gilbert、Letitia J. Yao、Ian A. Tonks
DOI:10.1021/jacs.6b09939
日期:2016.11.9
The inter- or intramolecular oxidative carboamination of alkynes catalyzed by [py2TiCl2NPh]2 is reported. These multicomponent reactions couple alkenes, alkynes and diazenes to form either α,β-unsaturated imines or α-(iminomethyl)cyclopropanes via a TiII/TiIV redox cycle. Each of these products is formed from a common azatitanacyclohexene intermediate that undergoes either β-H elimination or α,γ-coupling
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.
Chemoselective and stereoselective addition of organocuprates to α-oxoketene dithioacetals
作者:R.Karl Dieter、Jeffrey R. Fishpaugh、Louis A. Silks
DOI:10.1016/s0040-4039(00)87697-2
日期:1982.1
The chemoselective and stereoselectiveaddition of organocuprates to cyclic α-oxoketene dithioacetals affords predominately the vinylogous thioesters. An acyclic α-oxoketene dithioacetals affords the vinylogous thioester stereoselectively. The observed selectivities are dependent upon substrate structure and the organocopperreagent.
Titanium (IV) compounds and methods of forming heterocyclic compounds using same
申请人:REGENTS OF THE UNIVERSITY OF MINNESOTA
公开号:US10065976B2
公开(公告)日:2018-09-04
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.