Pseudohalogen chemistry. XI. Some aspects of the chemistry of α-thiocyanato-β-dicarbonyl compounds
作者:Elaine F. Atkins、Steven Dabbs、Robert G. Guy、Akbar A. Mahomed、Philip Mountford
DOI:10.1016/s0040-4020(01)85248-0
日期:1994.1
Enolised α-thiocyanato-β-dicarbonyl compounds dimerise in ethanol at room temperature to give tautomeric 4,5-disubstituted 2-amino- and 2-acetamido-thiazoles by a C-S-C + C-N cyclisation. Tautomerism is due to the unusual 4-(β-dicarbonyl-α-thio) substituent. Competing intramolecular cyclisations lead to minor amounts of heterocycles containing the thiazole and/or oxathiole ring systems
烯化的α-硫氰酸根合-β-二羰基化合物在室温下在乙醇中二聚,通过CSC + CN环化反应生成互变异构体4,5-二取代的2-氨基-和2-乙酰氨基-噻唑。互变异构是由于不寻常的4-(β-二羰基-α-硫代)取代基。竞争性的分子内环化反应会导致少量的含有噻唑和/或草硫醇环系统的杂环