Chelation-directed remote <i>meta</i>-C–H functionalization of aromatic aldehydes and ketones
作者:Shuguang Xie、Sen Li、Wenqian Ma、Xiaohua Xu、Zhong Jin
DOI:10.1039/c9cc05807a
日期:——
palladium-catalyzed remote meta-C–H functionalization of aromaticaldehydes and ketones. In situ-generation of acetals and ketals, as well as removal afterwards, makes the C–H bond functionalization process more straightforward and efficient. This also represents the first example of chelation-directed meta-C–H functionalization of aromaticaldehydes and ketones.
VILLIERAS, J.;RAMBAUD, M.;GRAFF, M., TETRAHEDRON LETT., 1985, 26, N 1, 53-56
作者:VILLIERAS, J.、RAMBAUD, M.、GRAFF, M.
DOI:——
日期:——
[EN] POLYMERIZATION INHIBITOR COMPOSITIONS, THEIR PREPARATION, AND THEIR USE<br/>[FR] COMPOSITIONS INHIBITRICES DE POLYMÉRISATION, LEUR PRÉPARATION ET LEUR UTILISATION
申请人:ALBEMARLE CORP
公开号:WO2008060844A1
公开(公告)日:2008-05-22
[EN] This invention provides a liquid polymerization inhibitor composition formed from ingredients comprised of tris(N-nitroso-N-phenylhydroxylamine)aluminum salt and a) 2-hydroxy-2-methylpropiophenone, 2-hydroxy-4'-(2-hydroxyethoxy)-2- methylpropiophenone, a,a-diethoxyacetophenone, or 1-benzoylcyclohexanol, or a combination of any two or more of these; or b) benzophenone, at least one ester having a benzoylphenyl group therein, or at least one acrylate having a benzoylphenyl group therein, or a combination of any two or more of these; or c) both a) and b). When a) is 1-benzoylcyclohexanol, then at least one ingredient from b) is also present in said composition. [FR] L'invention concerne une composition liquide inhibitrice de polymérisation formée à partir d'ingrédients composés d'un sel d'aluminium tris(N-nitroso-N-phenylhydroxylamine) et a) de 2-hydroxy-2-methylpropiophenone, 2-hydroxy-4'-(2-hydroxyethoxy)-2- methylpropiophenone, a,a-diethoxyacetophenone, ou de 1-benzoylcyclohexanol, ou d'une combinaison de deux composés quelconques ou plus; ou b) d'un benzophénone, d'au moins un ester comprenant un groupe benzoylphényle, ou d'au moins un acrylate comprenant un groupe benzoylphényle, ou d'une combinaison de deux composés quelconques ou plus; ou c) à la fois de a) et de b). Lorsque a) est 1-benzoylcyclohexanol, au moins un ingrédient provenant de b) est également présent dans la composition.