Synthesis of thiazolidines via regioselective addition of unsymmetric thioureas to maleic acid derivatives
作者:Alena S. Pankova、Mikhail A. Samartsev、Igor A. Shulgin、Pavel R. Golubev、Margarita S. Avdontceva、Mikhail A. Kuznetsov
DOI:10.1039/c4ra07840c
日期:——
The regioselectivity of the reaction between unsymmetric thioureas and maleic acid derivatives has been studied, and general regularities have been established.
未对称硫脲与马来酸衍生物之间反应的区域选择性已经被研究,并建立了一般规律。
Atmosphere-controlled selective synthesis of ureas and thioureas from isothiocyanates
作者:Pinyong Zhong、Junran Wu、Jin-Biao Liu、Nianhua Luo
DOI:10.1016/j.tetlet.2022.154143
日期:2022.10
An atmosphere-controlled selective synthesis of ureas and thioureas from isothiocyanates in the presence of 4-dimethylaminopyridine is described. A series of disubstituted ureas and thioureas were prepared in air and nitrogen atmosphere, respectively. This protocol employs benign reagents and exhibits good chemoselectivity and practicality.
Solvent-controlled selective synthesis of amides and thioureas from isothiocyanates
作者:Pinyong Zhong、Jiajia Wu、Junran Wu、Kunming Liu、Changfeng Wan、Jin-Biao Liu
DOI:10.1016/j.tetlet.2022.154099
日期:2022.9
A solvent-controlled selective synthesis of amides and thioureas from isothiocyanates in the presence of base is described. Amides were obtained via the base-promoted reaction of isothiocyanates and nitrile solvent. Interestingly, the use of water instead of a nitrile solvent provided symmetrical and unsymmetrical disubstituted thioureas. This protocol exhibits excellent chemoselectivity and practicality
Iodine promoted cyclization of <i>N</i>,<i>N</i>′-diphenylthiocarbamides with enaminones: a protocol for the synthesis of poly-substituted 2-iminothiazolines
作者:Xiao-Hu Xu、Zhi-Bing Dong
DOI:10.1039/d2ob01477g
日期:——
An iodine promoted cyclization reaction between N,N′-diphenylthiocarbamides and enaminones was achieved, providing a series of poly-substituted 2-iminothiazolines. This protocol is transition metal free and simple to perform, with a broad functional group tolerance and good to excellent yields under mild reaction conditions, showing potential synthetic value for the preparation of a diversity of biologically