Cycloaddition Reactions of [1,2]Dithiolo[1,2]dithiole Derivatives with Dimethyl Acetylenedicarboxylate: Formation of New Bi-, Tri- and Tetracyclic Thiopyran Derivatives
作者:E. Fanghänel、T. Palmer、J. Kersten、R. Ludwigs、K. Peters、H. G. Von Schnering
DOI:10.1055/s-1994-25639
日期:——
By cycloaddition reactions of the title compounds 1, new spiro[1,3-dithiole-thiopyran] derivatives 3 and 5 are available. Their cleavage with mercury(II) acetate leads to the corresponding bicyclic thiopyran-4-ones 9 and 10. Starting from 3H,6H-[1,2]dithiolo[4,3-c][1,2]dithiole- 3,6-dithione (1d), besides 4H,8H-2,3,6,7,4′,5′,4″,5″- octa-(methoxycarbonyl)thiopyrano[3,2-b]thiopyran-4-spiro-2′-(1′,3′- dithiole)-8-spiro-2″-(1″,3″-dithiole) (5), the tetra(5′,6′- methoxycarbonyl-1′,4′-dithiino)[2,3-c][2,3-e][2,3-i] [2,3-k]-1,2,7,8-tetrathiacyclododeca-3,5,9,11-tetraene (8) is formed.
通过标题化合物 1 的环加成反应,可以得到新的螺[1,3-二硫代-噻喃]衍生物 3 和 5。它们与乙酸汞(II)发生裂解反应,得到相应的双环噻喃-4-酮 9 和 10。从 3H,6H-[1,2]二硫环戊并[4,3-c][1,2]二硫杂环戊烯-3,6-二硫酮(1d)开始,除了 4H,8H-2,3,6,7,4′,5′,4″,5″-八-(甲氧羰基)噻喃并[3,2-b]噻喃-4-螺-2′-(1′、4-螺-2′-(1′, 3′-二硫代)-8-螺-2″-(1″, 3″-二硫代)(5),形成四(5′, 6′-甲氧羰基-1′, 4′-二硫代)[2,3-c][2,3-e][2,3-i][2,3-k]-1,2,7,8-四硫基环十二碳-3,5,9,11-四烯(8)。