Synthesis of [1,3]Dithiole and Spiro[1,3]dithiole Thiopyran Derivatives of the [1,2]Dithiolo[1,4]thiazine Ring System
作者:Susana Barriga、Pedro Fuertes、Carlos F. Marcos、Oleg A. Rakitin、Tomás Torroba
DOI:10.1021/jo020015a
日期:2002.9.1
polysulfur-nitrogen heterocycles by cycloaddition reactions to readily available tricyclic condensed 1,2-dithiole-3-thiones. Thus, treatment of bis[1,2]dithiolopyrrole ketothione 1 with diacyl acetylenes gave the bis-aducts 2a-d. On the other hand, cycloaddition of bis[1,2]dithiolo[1,4]thiazine ketothione 3 with 1 equiv of acyl or diacyl acetylenes gave [1,3]dithiolylidenyl[1,2]dithiolo[1,4]thiazines 4a-f in fair
我们报告了通过环加成反应可容易获得的三环缩合的1,2-二硫代3-硫酮的一些新的多硫-氮杂环的合成。因此,用二酰基乙炔处理双[1,2]二硫代吡咯酮酮噻酮1,得到双加合物2a-d。另一方面,双[1,2]二硫代[1,4]噻嗪酮噻酮3与1当量的酰基或二酰基乙炔的环加成反应得到[1,3]二硫代烯基[1,2]二硫代[1,4]噻嗪4a -f中等至高产。在反应中使用三氟甲磺酸催化反应,表明反应活性较低。用2当量的DBA处理3,得到双加合物5a,并且4c与DMAD的反应得到混合的双加合物5b。