CuI/DMPAO-Catalyzed N-Arylation of Acyclic Secondary Amines
摘要:
DMPAO has been found to be a powerful ligand to enable copper-catalyzed coupling of aryl halides with aliphatic acyclic secondary amines take place under relatively mild conditions, and coupling of aryl halides with primary amines and cyclic secondary amines proceeds at low catalyst loading.
作者:Hua Wang、Yanan Dong、Chaonan Zheng、Christian A. Sandoval、Xue Wang、Mohamed Makha、Yuehui Li
DOI:10.1016/j.chempr.2018.09.009
日期:2018.12
Selective cyanation of aryl halides was achieved with CO2 and NH3 as the only sources of carbon and nitrogen, respectively. In the presence of Cu catalysts under low pressure (3 atm), a variety of aromatic iodides and bromides were transformed to the desired nitrile products without the use of toxic metal cyanides. Notably, olefins, esters, amides, alcohols, and amino groups were tolerated. Mechanistic
Synthesis of Fluoroalkylated Pyrrolidines through Neat Reaction of Fluoroalkyl Iodides with
<i>N, N</i>
‐Diallylamines
作者:Ting Mao、Weipiao Li、Xiao‐Xiao Liu、Haoyang Wang、Wen‐Yong Han、Jie Tong、Shi‐Ji Xiao、Liang Zhao、Chun‐Yang He
DOI:10.1002/adsc.202300092
日期:——
We presented a cascade transformation of N, N-diallylamines and fluoroalkyl iodides into various functionalized fluoroalkylated pyrrolidines through a visible light-induced synthetic process in the solvent-free conditions. In this reaction system, the substrate N, N-diallylamine acted both as the base and the electron donor. We further demonstrated the practicality of this protocol by the direct modification
A device comprising:
a liquid crystal composition including a liquid crystal and a liquid crystal domain stabilizing compound, wherein the liquid crystal composition is switchable between a strongly scattering state of a first plurality of smaller liquid crystal domains that strongly scatters a predetermined light and a weakly scattering state of a second plurality of larger liquid crystal domains that weakly scatters the predetermined light; and
a liquid crystal containment structure defining a space for the liquid crystal composition.