Nitrogen-centered radical-mediated C–H imidation of arenes and heteroarenes <i>via</i> visible light induced photocatalysis
作者:Hyejin Kim、Taehoon Kim、Dong Gil Lee、Sang Weon Roh、Chulbom Lee
DOI:10.1039/c4cc03905j
日期:——
The C-H imidation of arenes and heteroarenes has been achieved via visible light induced photocatalysis. In the presence of an iridium(III) photoredox catalyst, the reaction of aromatic substrates with N-chlorophthalimide furnishes the N-aryl products at room temperature through a nitrogen-centered radical mediated aromatic substitution.
COMPOUND, RESIN, MATERIAL FOR FORMING UNDERLAYER FILM FOR LITHOGRAPHY, UNDERLAYER FILM FOR LITHOGRAPHY, PATTERN FORMING METHOD, AND METHOD FOR PURIFYING THE COMPOUND OR RESIN
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:US20170073288A1
公开(公告)日:2017-03-16
The compound according to the present invention is represented by a specific formula. The compound according to the present invention has a structure according to the specific formula, and therefore can be applied to a wet process and is excellent in heat resistance and etching resistance. In addition, the compound according to the present invention has such a specific structure, and therefore has a high heat resistance, a relatively high carbon concentration, a relatively low oxygen concentration and also a high solvent solubility. Therefore, the compound according to the present invention can be used to form an underlayer film whose degradation is suppressed at high-temperature baking and which is also excellent in etching resistance to oxygen plasma etching or the like. Furthermore, the compound is also excellent in adhesiveness with a resist layer and therefore can form an excellent resist pattern.
Novel tertiary (meth)acrylates having lactone structure, polymers, resist compositions and patterning process
申请人:Watanabe Takeru
公开号:US20050250924A1
公开(公告)日:2005-11-10
Novel tertiary (meth)acrylate compounds having a lactone structure are polymerizable into polymers having improved transparency, especially at the exposure wavelength of an excimer laser and dry etching resistance. Resist compositions comprising the polymers are sensitive to high-energy radiation, have a high resolution, and lend themselves to micropatterning with electron beams or deep-UV rays.
Electrochemically induced oxidative S–O coupling: synthesis of sulfonates from sulfonyl hydrazides and <i>N</i>-hydroxyimides or <i>N</i>-hydroxybenzotriazoles
作者:Alexander O. Terent'ev、Olga M. Mulina、Vadim D. Parshin、Vladimir A. Kokorekin、Gennady I. Nikishin
DOI:10.1039/c8ob03162b
日期:——
oxidation of the starting compounds to form a coupling product. The developed strategy represents a quite atom-efficient approach: one partner loses two nitrogen and three hydrogen atoms, while another one loses only one hydrogen atom. Cyclic voltammetry and the control experiment allowed us to propose possible reaction pathways: generated through anodic oxidation molecular bromine or its higher oxidation
开发了在电流作用下的氧化S-O偶联过程。芳基,杂芳基和烷基磺酰基酰肼和Ñ羟基化合物(Ñ -hydroxyimides和Ñ -hydroxybenzotriazoles)应用于作为起始试剂磺酸盐的制备。该反应在恒定电流条件下在实验方便的配有石墨阳极和不锈钢阴极的不分隔电化学电池中在高电流密度(60 mA cm -2)下进行。NH 4在此过程中,Br充当支撑电解质,并参与起始化合物的氧化,以形成偶联产物。制定的策略代表了一种相当有效的原子效率方法:一个配偶体损失两个氮原子和三个氢原子,而另一个伙伴仅损失一个氢原子。循环伏安法和对照实验使我们能够提出可能的反应途径:通过阳极氧化分子溴或其较高氧化态衍生物产生的氧化途径将起始化合物氧化而形成反应性物种,然后形成S-O键。
Regiospecific Intermolecular Aminohydroxylation of Olefins by Photoredox Catalysis
作者:Kazuki Miyazawa、Takashi Koike、Munetaka Akita
DOI:10.1002/chem.201501590
日期:2015.8.10
A simple and regiospecific aminohydroxylation of olefins by photoredoxcatalysis has been developed. N‐protected 1‐aminopyridinium salts are the key compounds and serve as amidyl radical precursors by the action of Ir photocatalysts, fac‐[Ir(ppy)3] and [Ir(ppy)2(dtbbpy)](PF6) (ppy=2‐pyridylphenyl, dtbbpy=4,4′‐di‐tert‐butyl‐2,2′‐bipyridine). The present photocatalytic system allows for synthesis of