Atom-efficient synthesis of 2,4,6-trisubstituted 1,3,5-triazines <i>via</i> Fe-catalyzed cyclization of aldehydes with NH<sub>4</sub>I as the sole nitrogen source
作者:Jiang Xiao、Shuang Ren、Qiang Liu
DOI:10.1039/d0ra03323e
日期:——
An atom-efficient, straightforward method for the synthesis of 2,4,6-triaryl-1,3,5-triazines via iron-catalyzed cyclization of aldehydes with NH4I as the sole nitrogen source is demonstrated. This strategy works smoothly under air atmosphere, and affords symmetrical 2,4,6-trisubstituted and unsymmetrical 1,3,5-triazines with yields from 18% to 72%. Compared to other methods, the present protocol provides
Reactions of Bis(silyl-substituted) Methyllithium with α-Hydrogen-free Nitriles into 1,3,5-Triazines
作者:Xia Chen、Sheng-Di Bai、Li Wang、Dian-Sheng Liu
DOI:10.3987/com-05-10357
日期:——
Bis(silyl-substituted) methyllithium has been found to catalyze a conversion of α-hydrogen-free nitriles directly to yield 2,4,6-trisubsituted s-triazines. The generally high yields and relatively mild reaction conditionsof this procedure suggest an alternative to other aromatic nitrile cyclotrimerization reactions. Silicotropic rearrangements from C to N or N to N and an unusual elimination of LiCR
已发现双(甲硅烷基取代)甲基锂可催化 α-无氢腈直接转化为 2,4,6-三取代 s-三嗪。该程序的一般高产率和相对温和的反应条件表明可以替代其他芳族腈环三聚反应。观察到从 C 到 N 或 N 到 N 的硅变重排和 LiCR 2 R' 的异常消除(R=SiMe 3 ,R'=SiMe 2 NMe 2 )。
METHOD FOR THE SEPARATION OF ENANTIOMERIC MIXTURES FROM METAL COMPLEXES
申请人:MERCK PATENT GMBH
公开号:US20190241591A1
公开(公告)日:2019-08-08
The present invention relates to processes for separating mixtures containing enantiomers of metal complexes with aromatic and/or heteroaromatic ligands, to metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes.
The invention provides organoboron precursors and facile photoirradiation and/or heating methods of making corresponding elimination products. Some elimination products are polycyclic aromatic molecules wherein a number of aromatic C—C moieties have been replaced by a B—N moiety to form azaborine compounds with interesting properties such as electronic, photophysical, luminescent, as well as chemical properties. Examples of polymer films that were doped with such compounds are shown wherein irradiated portions of the polymer film luminesce. The invention further provides methods of producing photoluminescence and electroluminescence, and uses of the compounds of the invention in luminescent probes, sensors, electroluminescent devices, hydrogen storage materials, optoelectronic materials, and bioactive molecules.