A highly efficient one-pot method for the synthesis of thioureas and 2-imino-4-thiazolidinones under microwave conditions
作者:Chi-Min Chau、Tzu-Jung Chuan、Kuan-Miao Liu
DOI:10.1039/c3ra46270f
日期:——
A one-pot synthesis of symmetrical and unsymmetrical substituted thioureas and 2-imino-4-thiazolidinones from simple starting materials under microwave irradiation and solventless conditions without base additives is presented. Various di- and trisubstituted thioureas are obtained in good yields in a few minutes. The sequential, three-component, one-pot synthesis of 2-imino-4-thiazolidinone derivatives is also studied, with satisfactory results obtained.
ABSTRACT In this work, di- and tri-substituted thiourea derivatives have been synthesized via a one-pot, three-component reaction from carbon disulfide and aliphatic or aromatic amines using choline chloride-urea deep eutectic solvent as a catalyst in water. Both cyclic and acyclic thiourea derivatives with two or three substituents were synthesized successfully. The reactions were done at 25–100°C
Zn catalyzed a simple and convenient method for thiourea synthesis
作者:Siddhanath D. Bhosle、Krishna A. Jadhav、Shivanand V. Itage、Sateesh Bandaru、Rajesh S. Bhosale、Jhillu Singh Yadav
DOI:10.1080/17415993.2022.2126319
日期:2023.3.4
aromatic amines with various substituted functional groups were transformed into thiourea derivatives. Zn-mediated symmetricthiourea creation occurs at room temperature for aliphatic amines, whereas for aromatic amines it occurs at 60°C. However, unsymmetricalthiourea for aliphatic amines occurs at 0°C. Benefits of this method include environment-friendly reaction conditions, sustainability, and enumerating
A variety of substituted thioureas result from thiuram disufides by a simple reaction with different amines.
The use of aqueous potassium dichloroiodate for the synthesis of ureas
作者:Gil Mendes Viana、Lúcia Cruz de Sequeira Aguiar、Jonas de Araújo Ferrão、Alessandro Bolis Costa Simas、Marcela Guariento Vasconcelos
DOI:10.1016/j.tetlet.2012.12.045
日期:2013.2
We report a straightforward and efficient reaction protocol for the syntheses of substituted ureas via treatment of thioureas with aqueous potassium dichloroiodate (KICl2). By tuning the reaction condition, thioureas bearing activated N-aryl substituents may undergo either selective oxidation or sequential oxidation and iodination, forming iodoaryl ureas in the latter case.