Recyclable nickel-catalyzed C–H/O–H dual functionalization of phenols with mandelic acids for the synthesis of 3-aryl benzofuran-2(3<i>H</i>)-ones under solvent-free conditions
Cooperative catalysis: Green synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions from phenols and mandelic acids using recyclable Ni(OTf)2 as a catalyst.
[EN] ALPHA-HYDROXY-BENZENEACETIC ACID DERIVATIVES, AND COMPOUNDS HAVING TWO 5-MEMBERED LACTONE RINGS FUSED TO CENTRAL CYCLOHEXA-1,4-DIENE NUCLEUS BASED UPON THE SAME, AND USES OF THE COMPOUNDS<br/>[FR] DERIVES D'ACIDE ALPHA-HYDROXY-BENZENEACETIQUE ET COMPOSES A BASE DE CEUX-CI COMPRENANT DEUX CYCLES LACTONE A 5 ELEMENTS FUSIONNES A UN NOYAU CYCLOHEXA-1,4-DIENE CENTRAL, ET UTILISATION DESDITS COMPOSES
申请人:KYUNG IN SYNTHETIC CORP
公开号:WO2005028409A1
公开(公告)日:2005-03-31
The present invention provides a-hydroxy benzeneacetic acid derivatives of the formula as defined in the specification which is a precursor indispensable for synthesis of compounds having two 5-membered lactone rings fused to central cyclohexa-1,4-diene nucleus, and a process of easily preparing the same. According to the preparation process of the present invention, the a-hydroxy benzeneacetic acid derivative can be readily prepared at high purity and yield without using toxic materials or producing toxic by-products. Some novel compounds, synthesized by using such a a-hydroxy benzeneacetic acid derivative, have excellent fastness properties, dye fixing rate and leveling property to general synthetic fiber materials such as polyester fibers and their blends with other fibers, especially to micro fibers, and also can be used as a coloring agent for plastic resins, color tonors, color filters, etc.
Enantioseparation of mandelic acid and substituted derivatives by high‐performance liquid chromatography with hydroxypropyl‐β‐cyclodextrin as chiral mobile additive and evaluation of inclusion complexes by molecular dynamics
The enantioseparation and resolution mechanism of mandelic acid (MA), 4-methoxymandelic acid (MMA), and 4-propoxymandelic acid (PMA) were investigated by reversed-phase high-performance liquid chromatography (HPLC) with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) as a chiral mobile-phase additive and molecular dynamics simulation. The suitable chromatographic conditions for the enantioseparation of MA
使用 2-羟丙基-β-环糊精的反相高效液相色谱 (HPLC) 研究了扁桃酸 (MA)、4-甲氧基扁桃酸 (MMA) 和 4-丙氧基扁桃酸 (PMA) 的对映分离和拆分机制(HP-β-CD) 作为手性流动相添加剂和分子动力学模拟。获得了适用于 MA、MMA 和 PMA 对映分离的色谱条件。在选定的色谱条件下,这些对映异构体可以实现基线分离。热力学参数分析结果表明,MA、MMA和PMA对映分离的主要驱动力可能是范德华力和氢键相互作用,这些手性化合物的色谱保留是一个焓驱动的过程。分子模拟结果表明,它们对HP-β-CD的手性拆分机制是形成对映异构体与具有不同构象和结合能的HP-β-CD的包合物的原因。HP-β-CD 的结合能与 (S )-异构体大于( R )-异构体,这与( S )-异构体第一次洗脱的实验结果一致。此外,还证实了相互作用能包括范德华能(∆ E vdw)、静电能(∆ E elec)、极性溶剂化能和
Polycyclic dyes
申请人:ZENECA LIMITED
公开号:EP0574148A1
公开(公告)日:1993-12-15
A polycyclic dye of the Formula (1):
wherein:
Ring Ais unsubstituted or is substituted by from 1 to 3 groups;
Ring Bis unsubstituted apart from the O(CH₂)mCO₂(CH₂)n-R¹ group or is substituted by from 1 to 4 further groups;
R¹is -H, alkoxy or a 5, 6 or 7-membered saturated or unsaturated heterocyclic residue;
mis an integer from 1 to 6; and
nis from 0 to 6.
These polycyclic dyes are useful for the coloration of synthetic textiles, particularly polyester textile materials to which they impart a bluish-red shade.