REACTION CATALYST FOR CROSS-COUPLING AND METHOD FOR MANUFACTURING AROMATIC COMPOUND
申请人:HOKKO CHEMICAL INDUSTRY CO., LTD.
公开号:US20150360214A1
公开(公告)日:2015-12-17
The object of the present invention is to provide a new organic phosphorus ligand that can efficiently promote cross-coupling reaction to obtain the target substance at high yield, as well as a method of manufacturing such ligand whose steric characteristics and electronic characteristics can be fine-tuned and which can be used to cause cross-coupling reaction at high yield. As a means for achieving the aforementioned object, a phosphine compound expressed by General Formula (1) below is provided.
(In the formula, R
1
and R
2
are each independently a secondary alkyl group, tertiary alkyl group, or cycloalkyl group, while R
3
and R
4
are each independently a hydrogen, aliphatic group, heteroaliphatic group, aromatic group, alicyclic group, or heterocyclic group. Note that R
3
and R
4
have no phosphorus atom and that R
3
and R
4
are not both hydrogen at the same time).
Triethanolamine-based deep eutectic solvent as a novel, biocompatible, reusable, and efficient dual catalyst/solvent media for the selective tosylation and mesylation of phenols
作者:Fatemeh Abbasi、Ali Reza Sardarian
DOI:10.1016/j.tet.2023.133780
日期:2024.2
reusable catalyst/solvent system, was applied for the selective tosylation of phenols under mild conditions. This DES can easily be recycled up to four times without significantly affecting the reaction progress. The advantages of this protocol are the absence of any additives, ligands and metals, as well as the use of a dual solvent/catalyst system, which includes easy preparation, stability and reusability
低共熔溶剂(DES)通常由氢键供体和氢键受体组成,由于其可调性、生物可降解性和合成成本低,最近被广泛研究为各种应用的有效且有用的溶剂。在这项工作中,我们通过热重分析(TGA)、傅里叶变换红外光谱(FT-IR)、差示扫描量热法(DSC)制备并鉴定了[苄基(2-羟乙基)二甲基氯化氮][三乙醇胺] 2作为一种新型DES。 )、循环伏安法 (CV)、氢电位 (pH)、折射率、粘度和电导率。该DES是一种可重复使用的催化剂/溶剂系统,用于在温和条件下选择性对苯酚进行甲苯磺酰化。这种 DES 可以轻松回收四次,而不会显着影响反应进度。该方案的优点是不存在任何添加剂、配体和金属,以及使用双溶剂/催化剂系统,包括易于制备、稳定性和可重复使用性、反应时间短和优异的产物产率。
Peroxygen bleaching and compositions therefor
申请人:FMC Corporation
公开号:EP0001495A1
公开(公告)日:1979-04-18
A process of removing soil and/or stains from fabrics by immersing the fabrics in a peroxygen bleach bath containing as a peroxygen activator a phenyl sulfonate ester of the formula:
wherein R is selected from the class consisting of a hydrocarbon radical of 1 to 16 carbon atoms and a heterocyclic radical having 1 ring or 2 fused rings, said ring or rings containing 5 to 6 members of which 1 to 2 are heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur; X is hydrogen or at least one electron withdrawing substituent and n is an integer of from 1 to 5. Also described are dry blend compositions containing the bleach bath components.