A General Approach to 4-unsubstituted and 4-alkyl-substituted 5-acyl-1,2,3,4-tetrahydropyrimidine-2-thiones(ones) via α-(thio)ureidoalkylation of 1,3-diketones or β-oxoesters
作者:Anatoly D. Shutalev、Anastasia A. Fesenko、Elena D. Strel’tsova
DOI:10.1007/s10593-023-03146-6
日期:2022.12
A new general approach to a large variety of hitherto hardly accessible 4-unsubstituted and 4-alkyl-substituted 5-acyl-1,2,3,4-tetrahydropyrimidine-2-thiones(ones) has been developed. The approach is based on the reaction of enolates of various 1,3-diketones or β-oxoesters with readily available N-[alkyl(tosyl)methyl]thioureas, N-(azidomethyl)thiourea, and N-[alkyl(tosyl)methyl]ureas followed by TsOH-catalyzed dehydration of the intermediate 4-hydroxyhexahydropyrimidine-2-thiones(ones) without or with isolation of the latter.
Unexpected 5-acetyl-4-hydroxy-4,5-dimethyl-hexahydropyrimidine-2-thione ring cleavage by the action of bases
作者:A. D. Shutalev、E. A. Kishko、S. G. Alekseeva
DOI:10.1007/bf02251639
日期:1999.6
Novel method for synthesis of 4-hydroxyhexahydropyrimidine-2-thiones
作者:A. D. Shutalev、V. A. Kuksa
DOI:10.1007/bf01171299
日期:1995.1
Acyl C→N migration in the thioureidomethylation of 2-(4-methylbenzoyl)cyclohexanone
作者:Anatoly D. Shutalev、Nadezhda E. Zhukhlistova、Galina V. Gurskaya
DOI:10.1070/mc2004v014n01abeh001866
日期:2004.1
The thioureidomethylation of the sodium enolate of 2-(4-methylbenzoyl)cyclohexanone 3 with N-(tosylmethyl)thiourea la or N-(azidomethyl)thiourea 2 in acetonitrile results in the unexpected formation of N-(4-methylbenzoyl)-N'-[(2-oxocyclohexyl)-methyl]thiourea 6, which was structurally characterised by X-ray diffraction analysis.
New method for the preparation of hydrogenated pyrimidine-2-thiones