1-dimethyl-3-aryl-thioureas were synthesised in good yields (70–92%) by reacting arylamines with S-aryl-N,N-dimethylthiocarbamate in DMSO in the presence of NaH at 90 °C. It is noteworthy that this method can also be used for arylamines containing a halogen atom at the ortho position.
在 90 °C 下,在 NaH 存在下,通过芳胺与 S-芳基-N,N-二甲基硫代氨基甲酸酯在 DMSO 中反应,合成了一系列 11 1,1-二甲基-3-芳基-硫脲,收率良好(70-92%) . 值得注意的是,该方法也可用于在邻位含有卤素原子的芳胺。
Easy S-Alkylation of Arylthioureas and 2-Mercaptobenzothiazoles Using Tetraalkylammonium Salts under Transition-Metal-Free Conditions
作者:Xiao-Hu Xu、Er-Jun Hao、Zhen Shi、Zhi-Bing Dong
DOI:10.1021/acs.joc.2c00728
日期:2022.8.5
A highly-efficient and practical method for S-alkylation of arylthioureas was reported. Using tetraalkylammonium salts as alkylation reagents, a series of 68 S-substituted aryl-isothioureas were obtained in good to excellent yields under transition-metal-free conditions. The protocol features simple performance, broad functional group tolerance, good to excellent yields, and easily available starting
Two-component initiator system (amine-free) with very good storage stability and particular suitability for acid systems
申请人:Utterodt Andreas
公开号:US20070040151A1
公开(公告)日:2007-02-22
A two-component initiator system having accelerators for curing polymerizable materials comprising the following components: (a) a hydroperoxide compound containing one or more hydroperoxide groups that are bound to a tertiary carbon; (b) a thiourea derivative; and (c) as accelerator, a copper compound which is soluble in the preparation is preferably free of amine and is particularly suited for polymerizable dental compositions.