Site-Specific Oxidation of (sp<sup>3</sup>)C–C(sp<sup>3</sup>)/H Bonds by NaNO<sub>2</sub>/HCl
作者:Jianyou Zhao、Tong Shen、Zhihui Sun、Nengyong Wang、Le Yang、Jintao Wu、Huichao You、Zhong-Quan Liu
DOI:10.1021/acs.orglett.1c01303
日期:2021.5.21
(sp3)C–C(sp3) and (sp3)C–H bonds in aryl alkanes by the use of NaNO2/HCl was explored. The method is chemical-oxidant-free, transition-metal-free, uses water as the solvent, and proceeds under mild conditions, making it valuable and attractive to syntheticorganicchemistry.
Iron-Mediated Radical Nitrohalogenation Reactions of Enynes with tert-Butyl Nitrite
作者:Yingming Ren、Yaxin Ge、Qinqin Yan、Yunfei Tian、Zejiang Li、Jilai Wu、Yujie Yang、Lijun Li
DOI:10.1055/a-1520-2192
日期:2021.7
A radical nitrohalogenation/cyclization of various enynes with tert-butylnitrite has been developed that conveniently introduces useful nitro and halo groups into organic compounds. Some control experiments were performed to elucidate the mechanism. Further functional transformations proceeded well in this reaction system.
New Insights into the Reactivity of Nitrogen Dioxide with Substituted Phenols: A Solvent Effect
作者:Paola Astolfi、Maria Panagiotaki、Lucedio Greci
DOI:10.1002/ejoc.200500016
日期:2005.7
Various alkyl-substituted phenols react readily with nitrogendioxide (·NO2) in different solvents at room temperature. In all cases nitration is the major reaction and leads to the formation of mono- and dinitrophenols and 4-nitrocyclohexa-2,5-dienones from 2,4,6-tri-substituted phenols. Oxidation, dimerisation and, in one case, nitrosation are also observed. The reaction pathway followed changes
Method for providing resistance to yellowing in polyamide articles and polyamide articles obtained from this method
申请人:RHODIA POLIAMIDA E ESPECIALIDADES S.A.
公开号:US10344143B2
公开(公告)日:2019-07-09
The present invention relates to a method for providing resistance to phenolic yellowing, during storage, transportation and processing of polyamide articles, caused by the presence of phenolic compounds in plastic package materials. The phenolic yellowing resistance is obtained by adding a sulfonated reagent during polymerization of the polyamide and/or during the formation of the polyamide article, like melt-spinning extrusion, and/or during the conversion of the polyamide article by texturizing.