1,8-Bis(diphenylmethylium)naphthalenediyl Dication as an Organic Oxidant: Synthesis of Benzidines via Self-Coupling of N,N-Dialkylanilines
摘要:
1,8-Bis(diphenylmethylium)naphthalenediyl dications promoted oxidative coupling of various N,N-dialkylanilines to afford the corresponding para-coupled bisanilines, benzidines, in good to excellent yield. The dications were readily prepared from a cyclic ether precursor, derived from 1,8-dibromonaphthalene, via deoxygenation with a silylating reagent in 1,1,1,3,3,3-hexafluoro-2-propanol under anhydrous conditions.
1,8-Bis(diphenylmethylium)naphthalenediyl Dication as an Organic Oxidant: Synthesis of Benzidines via Self-Coupling of N,N-Dialkylanilines
摘要:
1,8-Bis(diphenylmethylium)naphthalenediyl dications promoted oxidative coupling of various N,N-dialkylanilines to afford the corresponding para-coupled bisanilines, benzidines, in good to excellent yield. The dications were readily prepared from a cyclic ether precursor, derived from 1,8-dibromonaphthalene, via deoxygenation with a silylating reagent in 1,1,1,3,3,3-hexafluoro-2-propanol under anhydrous conditions.
[EN] AMPHIPHILIC AND MESOGENIC ORGANIC DYES FOR TAILOR-MADE REFLECTIVE LOW-DIMENSIONAL MATERIALS<br/>[FR] COLORANTS ORGANIQUES AMPHIPHILES ET MÉSOGÈNES POUR MATÉRIAUX TRIDIMENSIONNELS RÉFLÉCHISSANTS FABRIQUÉS SUR MESURE
申请人:CENTRE NAT RECH SCIENT
公开号:WO2020008052A1
公开(公告)日:2020-01-09
The present invention relates to a compound of the following formula (I): (I). The invention also relates to uses thereof as dye or pigment, notably as a luster pigment. The invention relates also to a reflective or photonic or nanophotonic or optoelectronic device comprising a compound of the invention. The invention relates also to a metal-like reflective coating,a metal-like particle or an organic-based metal-like liquid film comprising a compound of the invention.
Highly efficient Ru(<scp>ii</scp>)–alkylidene based Hoveyda–Grubbs catalysts for ring-closing metathesis reactions
作者:Mariam Y. Al-Enezi、Elizabeth John、Yehia A. Ibrahim、Nouria A. Al-Awadi
DOI:10.1039/d1ra07428h
日期:——
Three novel phosphine-free Ru-alkylidenes (7a–7c) have been synthesized and utilized as efficient catalysts for ring closing metathesis (RCM) reaction. Spectroscopic data, i.e. NMR and HRMS, along with single crystal X-ray diffraction analysis, were used to confirm their chemical structures. The tosylated carbenoid 7b showed the highest efficiency in cyclizing different acyclic diene substrates. RCM
已经合成了三种新型的不含膦的 Ru-亚烷基 ( 7a-7c ),并将其用作闭环复分解 (RCM) 反应的有效催化剂。光谱数据,即NMR 和 HRMS,以及单晶 X 射线衍射分析,用于确认它们的化学结构。甲苯磺酰化的类胡萝卜素7b在环化不同的无环二烯底物方面表现出最高的效率。与众所周知的 Grubbs 相比,仅使用催化量 (0.5–2.0 mol%) 的添加剂催化剂 ( 7b ) 就可以很好地耐受各种(未)取代的N、N-二烯丙基苯胺衍生物的 RCM 和不同大分子二烯的立体选择性 RCM (II) 和 Hoveyda-Grubbs (II) 催化剂。
Direct Use of Allylic Alcohols for Platinum-Catalyzed Monoallylation of Amines
A new direct catalytic amination of allylic alcohols promoted by the combination of platinum and a large bite-angle ligand DPEphos was developed in which the allylic alcohol was effectively converted to a pi-allylplatinum intermediate without the use of an activating reagent. The use of the DPEphos ligand was essential for obtaining high catalyst activity and high monoallylation selectivity of primary
Mechanistic Investigation of the Cobalt-Catalyzed Selective Conversion of Diallylanilines to Quinolines Involving C−N and C−H Activations
作者:Ling Li、William D. Jones
DOI:10.1021/ja070551q
日期:2007.9.1
2,3-Substituted quinolines were readily prepared from diallylanilines in good yields under mild conditions by using Co2(CO)(8) as catalyst. Regioselectivity has been explored by examining a series of electron-donating and electron-withdrawing functional groups at ortho, meta, and para positions of the diallylanilines. The results show that both steric and electronic effects influence the isolated yields
Dental Restorative Materials Based on Polymerizable Azides and Alkynes
申请人:Ivoclar Vivadent AG
公开号:US20140171536A1
公开(公告)日:2014-06-19
The invention relates to a dental restorative material on the basis of at least one compound of Formula I
A-[X-Q-(Y-CG)
n
]
m
Formula I,
wherein CG represents in each case independently an azide group N
3
or an alkyne group selected from the group consisting of —CR
1
R
2
—C≡CH,
with the proviso that the dental restorative material comprises at least one compound of Formula I comprising an azide group and at least one compound of Formula I comprising an alkyne group.
The invention also relates to the use of the dental restorative materials according to the invention for preparing dental composites, preferably composite blanks, which are suitable in particular for mechanical processing by means of computer-aided processing techniques such as milling and grinding processes, and which are suitable above all for preparing dental restoration materials such as inlays, onlays, crowns, bridges or veneering materials.