申请人:NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
公开号:US20190185420A1
公开(公告)日:2019-06-20
A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180° C. in the presence of zinc acetate and 2,2′-bipyridine.
Quinoxalinyl macrocyclic hepatitis C serine protease inhibitors
申请人:Nakajima Suanne
公开号:US20070060510A1
公开(公告)日:2007-03-15
The present invention relates to compounds of Formula I or II, or a pharmaceutically acceptable salt, ester, or prodrug, thereof:
which inhibit serine protease activity, particularly the activity of hepatitis C virus (HCV) NS3-NS4A protease. Consequently, the compounds of the present invention interfere with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.
Metal Identity Effects in the Pincer Complex-Catalyzed Dehydrogenative Coupling of Formamides with Alcohols to Form Carbamates
作者:Abebu A. Kassie、Ila Y. Castro De la Torre、Matthew S. Remy、Sukrit Mukhopadhyay、Jeff Kampf、Fengrui Qu、Melanie S. Sanford
DOI:10.1021/acs.organomet.3c00175
日期:2023.5.22
along with the corresponding carbamate. In contrast, all three of the N-bound metallacycles show dramatically lower reactivitytoward catalyst regeneration under analogous conditions. The reactivity of the pincer complexes toward formamide dehydrogenation also varies as a function of metal, with Ru and Fe ≫ Mn at 100 °C. Overall, the Mn pincer complex is an effective catalyst for the conversion of a variety
这份手稿描述了金属(钌与铁与锰)对甲酰胺与醇的 PNP 钳络合物催化脱氢偶联产生氨基甲酸酯的影响。进行研究以比较关键有机金属中间体的结构和反应性作为金属的功能。这些表明所有三种钳形催化剂都与异氰酸酯(甲酰胺脱氢的初始有机产物)快速反应,形成非循环金属环物质。然而,这些中间体的结构和反应性随金属的变化而变化。金属环的 N 键异构体由 Fe(文献)和 Ru(这项工作)形成,而 O 键(动力学)和 N 键(热力学)金属环均与 Mn 一起观察(这项工作)。在 100°C 时,与 O 结合的 Mn 环加合物与环己醇快速反应,释放钳形催化剂以及相应的氨基甲酸酯。相比之下,所有三种 N 结合的金属环在类似条件下都显示出对催化剂再生显着降低的反应性。钳状配合物对甲酰胺脱氢的反应性也随金属的变化而变化,在 100 °C 时,Ru 和 Fe ⇒ Mn。总的来说,锰螯合物是一种有效的催化剂,可在 150 °C
METHOD FOR PRODUCING CARBAMIC ACID ESTER
申请人:National Institute of Advanced Industrial Science
and Technology
公开号:EP3508473A1
公开(公告)日:2019-07-10
A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180°C in the presence of zinc acetate and 2,2'-bipyridine.
申请人:NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
公开号:US10752579B2
公开(公告)日:2020-08-25
A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180° C. in the presence of zinc acetate and 2,2′-bipyridine.