[EN] 6-HYDROXY-2,5,7,8-TETRAMETHYLCHROMAN-COMPOUNDS FOR THE TREATMENT OF CHRONIC OBSTRUCTIVE AIRWAY DISEASES [FR] COMPOSÉS 6-HYDROXY-2,5,7,8-TETRAMÉTHYLCHROMAN- POUR LE TRAITEMENT DE MALADIES OBSTRUCTIVES CHRONIQUES DES VOIES RESPIRATOIRES
Alkyl and alkoxycarbonyl radicals were generated by oxidative decarboxylation of oxalic acid monoesters by persulfate; they were then utilized for the selective substitution of quinones.
草酸单酯被过硫酸盐氧化脱羧生成烷基和烷氧羰基;然后将它们用于醌的选择性取代。
[EN] ACRYLATE-FUNCTIONAL BRANCHED ORGANOSILICON COMPOUND, METHOD OF PREPARING SAME, AND COPOLYMER FORMED THEREWITH<br/>[FR] COMPOSÉ D'ORGANOSILICIUM RAMIFIÉ À FONCTION ACRYLATE, SON PROCÉDÉ DE PRÉPARATION ET COPOLYMÈRE FORMÉ AVEC CELUI-CI
申请人:DOW SILICONES CORP
公开号:WO2020142474A1
公开(公告)日:2020-07-09
A method of preparing an acrylate-functional branched organosilicon compound ("compound") is provided, and comprises reacting (A) a branched organosilicon compound and (B) an acrylate compound in the presence of (C) a catalyst, wherein component (A) has the general formula X-Si(R1)3, where X comprises a halogen-functional moiety and each R1 is selected from R and –OSi(R4)3, with the proviso that at least one R1 is –OSi(R4)3; each R4 is selected from R, –OSi(R5)3, and –[OSiR2]mOSiR3; each R5 is selected from R, –OSi(R6)3, and –[OSiR2]mOSiR3; each R6 is selected from R and –[OSiR2]mOSiR3; each R is an independently selected hydrocarbyl group; and 0≤m≤100; with the proviso that at least one of R4, R5 and R6 is –[OSiR2]mOSiR3. The compound prepared by the method, a copolymer comprising the reaction product of the compound and a second compound, a method of forming the copolymer, and a composition comprising the copolymer are each also provided.
Quinone C–H Alkylations via Oxidative Radical Processes
作者:Ryan Baxter、Akil Hamsath、Jordan Galloway
DOI:10.1055/s-0037-1610005
日期:2018.8
context of selecting optimum radical precursors and initiators depending on quinone identity and functional groups present. A brief survey of radical additions to quinones is reported. Carboxylic acids, aldehydes, and unprotected amino acids are compared as alkyl radical precursors for the mono- or bis- C–H alkylation of several quinones. Two methods for radical initiation are discussed comparing inorganic
Selective activation of C H bond into C O bond of phenols in para-position via aerobic oxidation
作者:Shilei Yang、Guoqiang Xu、Song Shi、Hongchuan Xin、Jin Gao、Zengjian An
DOI:10.1016/j.catcom.2019.02.017
日期:2019.4
An efficient method for the oxidation of phenols to 1,4-benzoquinones catalyzed by cuprous(I) chloride was achieved in a solution of acetonitrile and water using molecular dioxygen as an oxidant. Particularly, the inert phenols, such as phenol and mono-alkyl substituted phenols, were effectively oxidized to 1,4-benzoquinones via the selectiveactivation of CH bond in para-position into CO bond under
-6-methyl-p-benzoquinones gave two kinds of C=C adducts, one formed through the addition to the C=C of methyl-substituted side and the other to that of chlorine-substituted side, and the latter adducts were not isolable due to the prompt dehydrochlorination forming the fully-conjugated isoxazoloquinones and subsequent C=O addition of another nitrile N-oxide forming spirodioxazole derivatives.