RECORDING MATERIAL PRODUCED USING NON-PHENOL COMPOUND
申请人:NIPPON SODA CO., LTD.
公开号:US20150284321A1
公开(公告)日:2015-10-08
An object of the present invention is to provide a recording material or a recording sheet using, as a color-developing agent, a non-phenol compound that is a safe compound in no danger of corresponding to an endocrine disruptor and is good in color developing performance. The non-phenol compound used in the present invention is at least one selected from the group consisting of compounds represented by the following formulas (I) to (III).
Photooxygenation of oxygen-substituted naphthalenes
作者:Marcel Bauch、Angela Krtitschka、Torsten Linker
DOI:10.1002/poc.3734
日期:2017.9
endoperoxides have been isolated and characterized at –78°C for the first time. Low‐temperature kinetics by UV spectroscopy revealed that alkoxy and silyloxy substituents remarkably increase the rate of photooxygenations compared to 1,4‐dimethylnaphthalene, whereas acyloxy‐substituted acenes are inert towards 1O2. The reactivities nicely correlate with HOMO energies and free activation energies, which we determined
已经研究了氧取代的萘与单线态氧(1 O 2)的反应,并且首次分离了不稳定的过氧化物,并在–78°C下进行了表征。紫外光谱的低温动力学表明,与1,4-二甲基萘相比,烷氧基和甲硅烷氧基取代基显着提高了光氧合速率,而酰氧基取代的并苯对1 O 2呈惰性。反应性与我们通过密度泛函理论计算确定的HOMO能量和自由活化能很好地相关。分离出的过氧化物的不稳定性是由于它们即使在–20°C下在释放1时也会与相应的萘发生非常快速的逆反应。O 2,使其在非常温和的条件下成为该反应物种的上等来源。最终,合成了碳水化合物取代的萘,该萘可与1 O 2可逆反应,并可能在未来的工作中用于对映选择性氧化。
Process for preparation of polyhydric alcohols
申请人:——
公开号:US20020157939A1
公开(公告)日:2002-10-31
A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of −8 to 3 at 25° C. to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
Thermosensitive recording material and color developer compound therefor
申请人:——
公开号:US20040071187A1
公开(公告)日:2004-04-15
A thermosensitive recording material has a support and a thermosensitive coloring layer formed thereon containing a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer including at least one compound (A) having in a molecule thereof at least two aromatic ring moieties with specific structures, selected from the group consisting of an aromatic ring moiety having at least one carboxyl group and electron-attracting functional group, an aromatic ring moiety having at least one carboxyl group and electron-donating functional group, and an aromatic ring moiety having at least one carboxyl group, free of the electron-attracting and electron-donating functional groups. An aromatic carboxylic acid compound serving as the above-mentioned compound (A) and the producing method thereof are also disclosed.
Reductive-alkylation and aromatic coupling reactions of 1,4-benzoquinone derivatives promoted by ethylaluminum dichloride
作者:Vitor F Ferreira、Francis J Schmitz
DOI:10.1016/s0022-328x(98)00865-1
日期:1998.11
Reactions of several substituted 1,4-benzoquinones with ethylaluminumdichloride in dichloromethane were studied. It was found that some quinones undergo a new radical aromatic coupling under these conditions, while others undergo a 1,6-reductive O-alkylation.