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.
Indium(III)-Catalyzed Synthesis of Primary Carbamates and N-Substituted Ureas
作者:Payal Malik、Isha Jain
DOI:10.1055/s-0040-1720927
日期:2022.1
An indium triflate-catalyzed synthesis of primary carbamates from alcohols and urea as an ecofriendly carbonyl source has been developed. Various linear, branched, and cyclic alcohols were converted into the corresponding carbamates in good to excellent yields. This method also provided access to N-substitutedureas by carbamoylation of amines. All the products were obtained by simple filtration or
已经开发出一种三氟甲磺酸铟催化的醇和尿素合成伯氨基甲酸酯,作为一种环保的羰基来源。各种直链、支链和环状醇以良好到极好的收率转化为相应的氨基甲酸酯。该方法还通过胺的氨基甲酰化提供了获得 N-取代脲的途径。所有产品均通过简单过滤或结晶得到,无需色谱纯化。机理研究表明,氨基甲酰化反应是通过与铟的 O 配位活化尿素进行的,然后是醇或胺对尿素羰基中心的亲核攻击。原料和催化剂廉价易得,反应时间短,
AZO COMPOUND, INK CONTAINING AZO COMPOUND, AND DISPLAY AND ELECTRONIC PAPER CONTAINING THE INK
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:US20150191601A1
公开(公告)日:2015-07-09
An azo compound excellent in solubility in solvent and having a high absorbance coefficient is disclosed, as well as an ink containing the azo compound. Such an ink contains a solvent having a relative permittivity at 22° C. and at a measurement frequency of 1 kHz of 3 or less and having a solubility in water at 25° C. of 20 mg/L or less, and an azo compound.
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.
METHOD FOR PRODUCING CARBAMATE AND METHOD FOR PRODUCING ISOCYANATE
申请人:ASAHI KASEI KABUSHIKI KAISHA
公开号:US20210179548A1
公开(公告)日:2021-06-17
The present invention provides a method for producing a carbamate that includes a step (1) and a step (2) described below:
(1) a step of producing a compound (A) having a urea linkage, using an organic primary amine having at least one primary amino group per molecule and at least one compound selected from among carbon dioxide and carbonic acid derivatives, at a temperature lower than the thermal dissociation temperature of the urea linkage; and
(2) a step of reacting the compound (A) with a carbonate ester to produce a carbamate.