The reaction of o-(chloromethyl)phenols with enamino ketones afforded a series of 3-acyl- and 3-formyl-4H-chromenes as a result of cascade transformation including [4 + 2]-cycloaddition of enamino ketone to o-quinone methide generated in situ and subsequent elimination of secondary amine.
[DE] BLEICHENDES WASCH- ODER REINIGUNGSMITTEL<br/>[EN] BLEACHING LAUNDRY DETERGENT OR CLEANER<br/>[FR] DÉTERGENT DE LAVAGE OU DE NETTOYAGE À EFFET BLANCHISSANT
申请人:HENKEL AG & CO KGAA
公开号:WO2013167602A1
公开(公告)日:2013-11-14
Die Oxidations- und Bleichwirkung von Persauerstoffverbindungen bei niedrigen Temperaturen sollte verbessert werden. Dies gelang im Wesentlichen durch den Einsatz bestimmter Metall- Carbenkomplexe.
Synthesis and Characterization of Divalent Manganese, Iron, and Cobalt Complexes in Tripodal Phenolate/N-Heterocyclic Carbene Ligand Environments
作者:Martina Käß、Johannes Hohenberger、Mario Adelhardt、Eva M. Zolnhofer、Susanne Mossin、Frank W. Heinemann、Jörg Sutter、Karsten Meyer
DOI:10.1021/ic4024053
日期:2014.3.3
Co(II) complexes. Zero-field 57Fe Mössbauer spectroscopy of the Fe(II) complexes 3, 4, 8, and 11 shows isomer shifts δ that increase gradually as carbenes are substituted for phenolates in the series of ligands. From the single-crystal structure determinations of the complexes, the different steric demand of the ligands is evident. Particularly, the molecular structure of 1—in which a pyridine molecule
合成了两种新颖的三脚架配体(BIMPN Mes,Ad,Me)-和(MIMPN Mes,Ad,Me)2–,结合了两种类型的供体原子,即NHC和酚盐供体,完成了N锚定的系列配体,范围从具有三(卡宾)螯合物种到三(酚盐)螯合臂。完整的配体系列为调节金属中心周围的电子和空间环境提供了一种便捷的方法,从而可以控制配合物的反应性。合成了该系列的Mn,Fe和Co的二价络合物,并用1表征1 H NMR,IR和UV / vis光谱以及单晶X射线衍射研究。在2至300 K范围内的可变温度SQUID磁化强度测量结果证实了所有二价络合物的高自旋基态,并揭示了零场分裂增加的趋势| D | 从Mn(II)到Fe(II)到Co(II)配合物。零场57中的Fe(II)的铁穆斯堡尔谱络合物3,4,8,和11表示随着碳烯被一系列配体中的酚盐取代,异构体位移δ逐渐增加。从配合物的单晶结构测定中,明显看出配体的不同空间需求。特别
Reaction of 2-chloromethylphenols with enaminones
作者:A. V. Lukashenko、D. V. Osipov、V. A. Osyanin、Yu. N. Klimochkin
DOI:10.1134/s1070428016120186
日期:2016.12
The reaction of o-(chloromethyl)phenols with enamino ketones afforded a series of 3-acyl- and 3-formyl-4H-chromenes as a result of cascade transformation including [4 + 2]-cycloaddition of enamino ketone to o-quinone methide generated in situ and subsequent elimination of secondary amine.