ArticleInternational journal of molecular sciences2023
[4+2]-Cycloaddition to 5-Methylidene-Hydantoins and 5-Methylidene-2-Thiohydantoins in the Synthesis of Spiro-2-Chalcogenimidazolones.
Article in International journal of molecular sciences, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Three-component reactions of conjugated dienes, CH acids and formaldehyde under diffusion mixing conditions.Beilstein journal of organic chemistry · 2025Article
- 1,3-Dipolar Cycloaddition of Nitrile Oxides and Nitrilimines to (-)-β-Caryophyllene: Stereoselective Synthesis of Polycyclic Derivatives and Their Biological Testing.International journal of molecular sciences · 2024Article
- Special Issue "Development and Synthesis of Biologically Active Compounds".International journal of molecular sciences · 2024Article
- [3+2]-Cycloaddition of Nitrile Imines to Parabanic Acid Derivatives-An Approach to Novel Spiroimidazolidinediones.International journal of molecular sciences · 2023Article
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9 authors.
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Abstract
Novel hydantion and thiohydantoin-based spiro-compounds were prepared via theDiels-Alder reactions between 5-methylidene-hydantoins or 5-methylidene-2-thiohydantoins and 1,3-dienes (cyclopentadiene, cyclohexadiene, 2,3-dimethylbutadiene, isoprene). It was shown that the cycloaddition reactions proceed regioselectively and stereoselectively with the formation of exo-isomers in the reactions with cyclic dienes andthe less sterically hindered products in the reactions with isoprene. Reactions of methylideneimidazolones with cyclopentadiene proceed viaco-heating the reactants; reactions with cyclohexadiene, 2,3-dimethylbutadiene, and isoprene require catalysis by Lewis acids. It was demonstrated that ZnI
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