Arndt; Milde; Tschenscher, Chemische Berichte, 1922, vol. 55, p. 349
作者:Arndt、Milde、Tschenscher
DOI:——
日期:——
Heterocyclization of 1-aryl/alkyl-2-thiobiureas to 4-aryl/alkyl-3-substituted-Δ 2 -1,2,4-triazolin-5-ones
作者:M.M Suni、Vipin A Nair、C.P Joshua
DOI:10.1016/s0040-4020(01)00018-7
日期:2001.3
Synthesis of a range of 1,2,4-triazolin-5-ones has been carried out by thermally induced cyclization of 1-aryl/alkyl-2-alkyl isothiobiureas 4. The required isothiobiureas were generated in situ by the reaction of alkyl halides with 1-aryl/alkyl-2-thiobiureas 3 in acidic medium at reflux. The reaction proceeds after S-alkylation of the thiobiureas and is demonstrated by the isolation of the alkyl isothiobiurea intermediates and their subsequent acid catalyzed thermal cyclization. (C) 2001 Elsevier Science Ltd. All rights reserved.
Guha; Chakraborty, Journal of the Indian Chemical Society, 1929, vol. 6, p. 106
作者:Guha、Chakraborty
DOI:——
日期:——
Synthesis and reactions of 3-aminothiazolidine-2-thion-4-one derivatives. 1. Conversion of 3-aminothiazolidine-2-thion-4-one derivatives to substituted mercapto-1,3,4-thiadiazoles