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Vol 60, No 2-3 (2024)
Articles
Oxidative Monofluorination of 1,4-Diiodo(or Dibromo)-2,3,5,6-tetramethylbenzenes in the System PbO₂—HF—Py—CH₂Cl₂
Abstract
The oxidation of 1,4-diiodo-2,3,5,6-tetramethylbenzene (diiododurene) and 1,4-dibromo-2,3,5,6-tetramethylbenzene (dibromodurene) by lead dioxide PbO₂ in Olah reagent, hydrogen fluoride-pyridine mixture, with CH₂Cl₂ as a co-solvent at room temperature for 96 h results in the corresponding products of monofluorination of methyl group. This is the first example of using the oxidative system PbO₂—HF—Py—CH₂Cl₂ for side-chain monofluorination of methylated benzenes.
146–150
Reaction of 4-Hydroxyspiro[pyrrole-2,3′-pyrrole] and 4′-Hydroxyspiro[imidazole-5,2′-pyrrole] Derivatives with Dicyclohexylcarbodiimide
Abstract
The reaction of substituted 4-hydroxyspiro[pyrrole-2,3′-pyrrole] and 4′-hydroxyspiro[imidazole-5,2′-pyrrole] with dicyclohexylcarbodiimide leads to the corresponding derivatives of 4-ureidospiro[pyrrole-2,3′-pyrrole] and 4′-ureidospiro[imidazole-5,2′-pyrrole]. The thermal decomposition of the obtained ureidospirobisheterocycles proceeds nonselectively.
151–161
Synthesis of Spiro[indole-3,2′-pyrrole]triones by the Reaction of Pyrrolobenzoxazepinetriones with Enaminoketone
Abstract
The reaction of 3-aroylpyrrolo[1,2-a][4,1]benzoxazepin-1,2,4-triones with 3-cyclohexylamino-5,5-dimethylcyclohex-2-en-1-one leads to the formation of 3′-(4-aroyl)-4′-hydroxy-1′-(2-(hydroxymethyl)phenyl)-6,6-dimethyl-1-cyclohexyl-6,7-dihydrospiro[indole-3,2′-pyrrole]-2,4,5′(1H,1′H,5H)-triones. A new scheme for the interaction of 3-aroylpyrrolo[1,2-а][4,1]benzoxazepine-1,2,4-triones with N-substituted enaminoketones leading to the formation of derivatives of the difficult-to-reach heterocyclic systems of spiro[indole-3,2′-pyrrole]triones is described.
162–166
Reaction of Tetrahydropyrimidine-2(1H)-thione Derivatives with Thiolated Acid Hydrazides as a Method of Synthesis of Biologically Active Ligands of Gold Glyco-Nanoparticles
Abstract
The reaction of 4-hydroxy-1-phenyl-6-methyltetrahydropyrimidine-2(1H)-thione with 6-mercaptohexanoic and lipoic (thioctic) acids hydrazides in yields of 60–75% to form 4-[ω-(mercaptoacyl)hydrazino]-tetrahydropyrimidine-2(1H)-thiones as a promising сo-ligands for the preparation of gold glyco-nanoparticles for biomedical purposes.
167–169
170–396