New access to thioglycolurils by condensation of 4,5-dihydroxyimidazolidin-2-ones(thiones) with HSCN
摘要:
A general and highly effective protocol for the direct synthesis of mono- and dithioglycolurils containing various substituents at the 1,3-nitrogen atoms has been developed based on the condensation of easily accessible dihydroxyimidazolidin-2-ones with HSCN under mild reactions conditions. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis and Structure of 1-Substituted Semithioglycolurils
作者:Vladimir V. Baranov、Anton A. Galochkin、Yulia V. Nelyubina、Angelina N. Kravchenko、Nina N. Makhova
DOI:10.1055/s-0040-1707391
日期:2020.9
Two methods for the synthesis of previously unavailable 1-substituted semithioglycolurils were developed. These methods consist of the cyclocondensation of 1-substituted ureas with 4,5-dihydroxy- or 4,5-dimethoxyimidazolidine-2-thione or glyoxal, followed by the reaction of the resulting 1-substituted 4,5-dihydroxyimidazolidine-2-ones with HSCN in a two-step one-pot procedure. Two of the desired semithioglycolurils