铑(II)可以通过分子内的氮杂C–H插入反应有效地促进芳基氨基甲酸酯底物的活化和环化,从而生成苯并恶唑啉酮。对底物范围的研究表明,该反应在更不稳定的o -C(sp 3)-H键上进行了选择性芳族C(sp 2)-H胺化反应。反向二次KIE的观察结果(P H / P D = 0.42±0.03)表明,芳族亲电取代机理参与了芳基CH酰胺化反应。
METHOD FOR PRODUCING TRANS-BIS(AMINOMETHYL)CYCLOHEXANE, METHOD FOR PRODUCING BIS(ISOCYANATOMETHYL)CYCLOHEXANE, BIS(ISOCYANATOMETHYL)CYCLOHEXANE, POLYISOCYANATE COMPOSITION, AND POLYURETHANE RESIN
申请人:MITSUI CHEMICALS, INC.
公开号:US20160207875A1
公开(公告)日:2016-07-21
A method for producing trans-bis(aminomethyl)cyclohexane includes a trans-isomerization step in which cis-dicyanocyclohexane is isomerized into trans-dicyanocyclohexane by heating dicyanocyclohexane containing cis-dicyanocyclohexane in the presence of a tar component produced by distillation of dicyanocyclohexane; and an aminomethylation step in which trans-dicyanocyclohexane produced by the trans-isomerization step is allowed to contact with hydrogen to produce trans-bis(aminomethyl)cyclohexane.
[EN] FACTOR XIIa INHIBITORS<br/>[FR] INHIBITEURS DU FACTEUR XIIA
申请人:MERCK SHARP & DOHME
公开号:WO2018093695A1
公开(公告)日:2018-05-24
The present invention provides a compound of Formula (I) and pharmaceutical compositions comprising one or more said compounds, and methods for using said compounds for treating or preventing thromboses, embolisms, hypercoagulability or fibrotic changes. The compounds are selective Factor XIIa inhibitors.
Superparamagnetic Fe<sub>3</sub>
O<sub>4</sub>
Nanoparticles in a Deep Eutectic Solvent: An Efficient and Recyclable Catalytic System for the Synthesis of Primary Carbamates and Monosubstituted Ureas
Superparamagnetic Fe3O4 nanoparticles were used to prepare primary carbamates as well as monosubstituted and N,N‐disubstituted ureas. This efficient phosgene‐free process used urea as an eco‐friendly carbonyl source in the presence of a biocompatible deep eutectic solvent (DES) to provide an inexpensive and attractive route that afforded the products in moderate to excellent yields. (MNP = magnetite nanoparticles
超顺磁性Fe 3 O 4纳米颗粒用于制备氨基甲酸酯以及单取代的和N,N-二取代的脲。这种有效的无光气工艺在生物相容性深共熔溶剂(DES)的存在下将尿素用作环保的羰基来源,从而提供了一种廉价且有吸引力的途径,使产品收率适中至优异。(MNP =磁铁矿纳米颗粒,Ch =胆碱)
4-Dodecylbenzenesulfonic acid (DBSA) promoted solvent-free diversity-oriented synthesis of primary carbamates, S-thiocarbamates and ureas
作者:Ali Reza Sardarian、Iman Dindarloo Inaloo
DOI:10.1039/c5ra14528g
日期:——
A simple and efficient solvent-free preparation of primary carbamates,S-thiocarbamates and ureas from alcohols, phenols, thiols and amines in the presence of 4-dodecylbenzenesulfonic acid, as a cheap and green Brønsted acid, has been described.
A method for producing a carbonyl compound of the present invention comprises a step (X) of reacting a specific compound having a urea bond with a carbonic acid derivative having a carbonyl group (—C(═O)—) under heating at a temperature equal to or higher than the thermal dissociation temperature of the urea bond to obtain the carbonyl compound.