A selective, efficient and environmentally friendly method for the oxidative cleavage of glycols
作者:Nuria García、Rubén Rubio-Presa、Patricia García-García、Manuel A. Fernández-Rodríguez、María R. Pedrosa、Francisco J. Arnáiz、Roberto Sanz
DOI:10.1039/c5gc02862k
日期:——
A catalytic methodology for the oxidativecleavage of vicinal diols is described as an advantageous alternative in terms of environmental impact to classical methods involving toxic oxidants. The novel strategy...
Magnetic magnetite nanoparticals catalyzed selective oxidation of α-hydroxy ketones with air and one-pot synthesis of benzilic acid and phenytoin derivatives
A clean and efficient protocol for selective oxidation of α-hydroxy ketones using magnetic magnetite nanoparticals (Fe3O4·MNPs) as catalyst with air as green oxidant has been developed. Application of Fe3O4·MNPs was also proved to be successful in one-pot synthesis of benzilic acid and phenytoin derivatives. The facile one-pot procedure enhanced the production efficiency, shortened the reaction time
已开发出一种清洁有效的方案,以磁性磁铁矿纳米粒子(Fe 3 O 4 ·MNPs)为催化剂,以空气为绿色氧化剂,选择性氧化α-羟基酮。Fe 3 O 4 ·MNPs在单锅合成苯甲酸和苯妥英衍生物中也被证明是成功的。简便的一锅法提高了生产效率,缩短了反应时间,并最大程度地减少了化学废物。值得注意的是,该催化剂可以重复使用至少五次,而没有任何明显的活性损失。
[EN] CHEMICAL COMPOUNDS<br/>[FR] COMPOSES CHIMIQUES
申请人:ASTRAZENECA AB
公开号:WO2004011410A1
公开(公告)日:2004-02-05
Compounds of formula (I):wherein variable groups are as defined within; for use in the inhibition of 11βHSD1 are described.
式(I)的化合物:其中变量基团如定义内;用于抑制11βHSD1。
Borane-Catalyzed Chemoselectivity-Controllable N-Alkylation and <i>ortho</i> C-Alkylation of Unprotected Arylamines Using Benzylic Alcohols
作者:Shan-Shui Meng、Xiaowen Tang、Xiang Luo、Ruibo Wu、Jun-Ling Zhao、Albert S. C. Chan
DOI:10.1021/acscatal.9b03038
日期:2019.9.6
efficient and highlychemoselective alkylation of unprotected arylamines using alcohols catalyzed by B(C6F5)3 has been developed. The reaction gives N-alkylated products and ortho C-alkylated products in different solvents in good chemoselectivities and yields. Control experiments and DFT calculations indicated that the borane underwent alcohol/arylamine exchange to ensure catalytic activity, and a
已经开发出一种空前的方案,用于使用受B(C 6 F 5)3催化的醇对未保护的芳基胺进行高效且高度化学选择性的烷基化反应。该反应在不同溶剂中以良好的化学选择性和收率得到N-烷基化产物和邻C-烷基化产物。控制实验和DFT计算表明,硼烷进行了醇/芳基胺交换以确保催化活性,并提出了涉及碳正离子化的可能机理。
Stetter Reaction in Room Temperature Ionic Liquids and Application to the Synthesis of Haloperidol
作者:Siddam Anjaiah、Srivari Chandrasekhar、René Grée
DOI:10.1002/adsc.200404123
日期:2004.9
Imidazolium-type roomtemperatureionic liquids (RTILs) have been used for the Stetter reaction, affording the desired 1,4-dicarbonyl compounds in good yields. Thiazolium salts and Et3N are efficient catalysts for this reaction performed in ionic liquid. The possibility to recycle and reuse the solvent has been demonstrated, although it was not possible to recycle the thiazolium catalyst. This method