Procédé de préparation d'anhydrides d'acides alcényl-dicarboxyliques
申请人:INSTITUT FRANCAIS DU PETROLE
公开号:EP0064924A1
公开(公告)日:1982-11-17
Procédé de préparation d'anhydrides d'acides alcényl-dicarboxyliques, qui comprend la mise en réaction de proportions sensiblement stoechiométriques d'une polyoléfine halogénée, par exemple du polyisobutène chloré et d'un anhydride d'acide dicarboxylique insaturé par exemple de l'anhydride maléique, en présence d'une porportion mineure d'un composé organique tel qu'une halogénoquinone, une cyanoquinone, un anhydride halogenomaléique ou une polycyanooléfine à une température de 150 à 200c C. La reaction est quasi totale au bout d'un temps de 7 à 10 heures.
Les produits sont utilisés comme matières premières dans la fabrication d'additifs pour carburants et lubrifiants.
ELECTROLYTE, AND ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE INCLUDING SAME
申请人:Ningde Amperex Technology Limited
公开号:US20220153690A1
公开(公告)日:2022-05-19
An electrolyte including one or more nitrile benzoquinone compounds, and the nitrile benzoquinone compound is selected from the group consisting of the compounds represented by formula I, formula II, and formula III:
The substituents R
1
to R
9
are each independently selected from the group consisting of hydrogen, a C
2
to C
12
ether group, a C
1
to C
12
alkoxy group, halogen, a C
1
to C
12
alkyl group, a C
2
to C
12
alkenyl group, a C
2
to C
12
alkynyl group, and a C
6
to C
26
aryl group. The electrolyte can form a stable protective film on a cathode, thereby increasing the cycle capacity retention rate and high temperature storage performance of an electrochemical device.
US4870049A
申请人:——
公开号:US4870049A
公开(公告)日:1989-09-26
Dearomatization of Electron‐Deficient Phenols to
<i>ortho</i>
‐Quinones: Bidentate Nitrogen‐Ligated Iodine(V) Reagents
作者:Xiao Xiao、Nathaniel S. Greenwood、Sarah E. Wengryniuk
DOI:10.1002/anie.201909868
日期:2019.11.4
ortho‐quinones by direct oxidation of phenols. The reaction is enabled by a novel bidentate nitrogen‐ligated iodine(V) reagent, a previously unexplored class of compounds which we have termed Bi(N)‐HVIs. The reaction is extremely general and proceeds with excellent regioselectivity for the ortho over para isomer. Functionalization of the ortho‐quinone products was examined, resulting in a facile one‐pot synthesis
尽管其用途广泛,邻醌的合成仍然是一个重大挑战,特别是获得缺电子衍生物仍然是一个未解决的问题。这里报道了第一个通过酚类直接氧化合成缺电子邻醌的通用方法。该反应是通过一种新型双齿氮连接碘 (V) 试剂实现的,这是一类以前未开发的化合物,我们将其称为 Bi( N )-HVI。该反应非常普遍,并且对于邻位异构体和对位异构体具有优异的区域选择性。对邻醌产物的官能化进行了检查,从而实现了儿茶酚的简单一锅合成,以及多种杂原子亲核试剂的掺入。该方法代表了 Bi( N )-HVI的首次合成应用,并展示了它们作为进一步开发高反应性、高度可调的 I(V) 试剂的平台的潜力。
Oxidative Functionalization of Catechol Derivatives Substituted with Electron-Withdrawing Groups
Catechols possessing electron-withdrawing groups at the C3 position effectively underwent oxidative functionalization at the C4 position in the presence of phenyliodine(III) diacetate (PIDA) and heteroarene nucleophiles (e.g., indole, indazole, and benzotriazole) to produce the corresponding biaryl products. The PIDA-mediated oxidation of catechol derivatives afforded the ortho-benzoquinone intermediate