双(2-氰基丙-2-基)三硫代碳酸酯(TTC-bCP)是一种新的对称三硫代碳酸酯,具有迄今为止报道的可逆加成-断裂链转移(RAFT)聚合反应最好的离去基团。我们提出了一种从 2,2'-偶氮双(2-甲基丙腈)(AIBN)作为 2-氰基丙-2-基基团的供体开始获得TTC-bCP的优雅途径。TTC-bCP允许制备高摩尔质量 ( M n ≈ 135 kg mol –1 ) 甲基丙烯酸甲酯-丙烯酸正丁酯-甲基丙烯酸甲酯三嵌段共聚物,具有前所未有的控制 ( D̵= 1.04) 在可逆失活自由基聚合中。这种三嵌段共聚物的流变学测量显示出典型的热塑性弹性体行为,在高达 120 °C 时具有稳定的橡胶平台。
METHOD FOR THE PREPARATION OF SUBSTITUTED THIOLACTONES, NEW SUBSTITUTED THIOLACTONES AND USES THEREOF
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20190202849A1
公开(公告)日:2019-07-04
The invention relates to a method for preparing substituted thiolactones of formula (I), new substituted thiolactones of formula (I′) that can be obtained by carrying out said method, and the use of substituted thiolactones of formula (I) or (I′) for synthesizing polymers or functionalizing surfaces or polymers.
METHOD FOR PREPARING THIOLACTONES, THIOLACTONES OBTAINED BY SAID METHOD AND USES THEREOF
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20190359603A1
公开(公告)日:2019-11-28
The present invention relates to a process for the preparation of substituted thiolactones of formula (I) or of substituted thiolactones of formula (I′) which are capable of being obtained by the implementation of this process, and to the use of substituted thiolactones of formula (I) or of formula (I′) in the preparation of polymers or in the functionalization of particles, of flat surfaces or of polymers.
Deoxygenative coupling of alcohols with aromatic nitriles enabled by direct visible light excitation
作者:Yanjiao Xiong、Xuesong Wu
DOI:10.1039/d3ob01676e
日期:——
A general and practical protocol is presented for visible-light-driven deoxygenativecoupling of alcohols with aromatic nitriles in the absence of external photocatalysts. Utilizing a hydroxyl activation strategy with carbon disulfide, this C(sp3)–C(sp2) constructing platform accommodates a broad scope of alcohols and aryl nitriles to deliver various alkyl-substituted arenes. Mechanism studies show
Visible-Light-Driven Deoxygenative Heteroarylation of Alcohols with Heteroaryl Sulfones
作者:Yanjiao Xiong、Qi Zhang、Jun Zhang、Xuesong Wu
DOI:10.1021/acs.joc.3c02733
日期:2024.3.1
visible-light-promoted deoxygenative radical heteroarylation of alcohols was achieved in the absence of any external photosensitizers. The processes occur through the generation of xanthate salts from alcohols, followed by SET and fragmentation, delivering alkyl radicals to react with heteroaryl sulfones. This method is amenable for a wide range of alcohols with good functional group tolerance, providing a practical
可见光促进的醇脱氧自由基杂芳基化是在没有任何外部光敏剂的情况下实现的。该过程是通过从醇生成黄原酸盐,然后进行 SET 和裂解,传递烷基自由基与杂芳基砜反应而发生的。该方法适用于多种醇,具有良好的官能团耐受性,为苯并杂芳烃的烷基化提供了实用的策略。机理研究表明,黄原酸阴离子的直接可见光激发和随后的 SET 引发反应。