By employing reusable nanocobalt oxides as the catalysts, a site-specific oxidative C–H chalcogenation of (hetero)aryl-fused cyclicamines with various thiols and diselenides is presented for the first time. The reaction proceeds selectively at the sites of the (hetero)aryl rings para to the N atom, and enables access to a wide array of chalcogenyl N-heteroarenes. The merits of the transformation involve
通过使用可重复使用的纳米钴氧化物作为催化剂,首次提出了(杂)芳基稠合的环状胺与各种硫醇和二硒化物的位点特异性氧化C–H硫属元素化。该反应在(杂)芳环的位点选择性地进行对位的N原子,并且使得获得了广泛阵列chalcogenyl的N-杂芳烃的。该转化的优点包括高的步长和原子效率,优异的底物和功能相容性,操作简便性以及使用自然丰富的Co / O 2系统。目前的工作为从容易获得的原料中选择性合成功能性N-杂芳烃提供了基础。
Process for producing ethylidenediacetate
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP0025702A2
公开(公告)日:1981-03-25
A process for producing ethylidenediacetate which comprises reacting methyl acetate or dimethyl ether, carbon monoxide and hydrogen in the presence of catalyst comprising as a secondary-component at least one material selected from iodides and bromides and as a main component at least one material selected from nickel, nickel compounds, cobalt and cobalt compounds under substantially anhydrous conditions is disclosed. According to the present invention synthesis of ethylidenediacetate is achieved by using cheaper catalyst than the prior catalyst.
Convenient synthesis of 5-aryl(alkyl)sulfanyl-1,10-phenanthrolines from 5,6-epoxy-5,6-dihydro-1,10-phenanthroline, and their activity towards fungal β-d-glycosidases
作者:Irina A. Dotsenko、Matthew Curtis、Nataliya M. Samoshina、Vyacheslav V. Samoshin
DOI:10.1016/j.tet.2011.07.058
日期:2011.9
A broad series of novel 5-aryl(alkyl)sulfanyl-1,10-phenanthrolines has been prepared by a new simple procedure: a treatment of the commercially available 5,6-epoxy-5,6-dihydro-1,10-phenanthroline with various thiols in the presence of a base. Other functional groups attached to the thiol allow a use of the products as building blocks in synthesis of versatile ligands and in functionalization of surfaces. The synthesized phenanthrolines showed a moderate ability as activators or inhibitors of fungal beta-D-glucosidases and beta-D-galactosidases. (C) 2011 Elsevier Ltd. All rights reserved.
Process for producing vinyl acetate, acetic acid and ethanol