A POLYMER AND A TOPICAL COMPOSITION COMPRISING THE POLYMER
摘要:
The present invention relates to a polymer of formula I, a cosmetic composition comprising the polymer of formula I, a method of synthesizing the polymer of formula I; and use of the polymer of formula Ito provide a benefit in a photoresponsive way.
Application of polydopamine sulfamic acid-functionalized magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles (Fe<sub>3</sub>O<sub>4</sub>@PDA-SO<sub>3</sub>H) as a heterogeneous and recyclable nanocatalyst for the formylation of alcohols and amines under solvent-free conditions
作者:Sepideh Taheri、Hojat Veisi、Malak Hekmati
DOI:10.1039/c7nj00417f
日期:——
Herein, formylation of structurally different amines and alcohols with ethyl formate was carried out in the presence of a catalytic proportion of sulfonic acid supported on polydopamine (PDA)-encapsulated Fe3O4 nanoparticles as a heterogeneous, recyclable, and greatly efficient catalyst; this method provided the corresponding N-formyl compounds in good to excellent yields under solvent-free conditions
本文中,结构上不同的胺类和醇类与甲酸乙酯的甲酰化反应是在催化比例的磺酸负载在聚多巴胺(PDA)包裹的Fe 3 O 4纳米颗粒上作为多相,可回收且高效的催化剂进行的。该方法在无溶剂条件下以良好或优异的收率提供了相应的N-甲酰基化合物。通过使用外部磁体设备绕开了费时的过滤操作,回收了磁催化系统。该程序还提高了产品的纯度,并有望带来经济和生态优势。此外,证实了催化剂的回收和再利用五次,没有发现活性损失。
Tribromoisocyanuric Acid (TBCA) as a Mild and Metal Free Catalyst for the Acetylation and Formylation of Hydroxyl Groups under Solvent Free Conditions
作者:Zahra Hekmatian、Ardeshir Khazaei
DOI:10.13005/ojc/310335
日期:2015.9.24
A convenient approach for acetylation and formylation of various types of alcohols and phenols with acetic anhydride and formic acid in the presence of Tribromoisocyanuric acid (TBCA) as catalyst is reported. The reactions were carried out under solvent-free condition and in good to high yields at room temperature. This present method is featured with relatively mild reaction conditions, simple operation, broad substrate scope, clean work-up, short reaction times, good to high yields, excellent selectivity and also avoids tedious purifications and the use of toxic reagents.
Process for the production of solid cooling agents
申请人:Symrise AG
公开号:US10328405B2
公开(公告)日:2019-06-25
Suggested is a process for the production of solid cooling agents, wherein a pre-scraped melt, i.e., a melt of menthol compounds with added seed crystals is applied to a pre-cooled area by even deposition of drops.