2-Dimethoxyphosphoryl-5,6-dihydro-1,3-dithiolo[4,5-b][1,4]-2-dithiin (8) and 2-triphenylphosphonio-5,6-dihydro-1,3-dithiolo-[4,5-b][1,4]dithiin tetrafluoroborate (9) have been obtained in four steps from 4,5-ethylenedithio-1,3-dithiole-2-thione (4) (ca. 75% overall yield). Deprotonation of (8) and (9) yields the corresponding carbanion (10) and ylide (11) which have been trapped in good yield with glyoxal, cyclopentanone and anthraquinone to afford ethylenedithio-1,3-dithiafulvalenes.
2-二甲氧基
磷酸基-5,6-二氢-
1,3-二噻烷-[4,5-b][1,4]-2-二
硫烯 (8) 和 2-三苯基
磷酸根-5,6-二氢-
1,3-二噻烷-[4,5-b][1,4]二
硫烯四
氟硼酸盐 (9) 通过四个步骤从 4,5-
乙烯二
硫-1,3-二
硫烯-2-
硫酮 (4) 获得,整体产率约为 75%。对 (8) 和 (9) 去质子化得到相应的负离子 (10) 和亚
磷烯 (11),这两者与
乙二醛、
环戊酮和
蒽醌反应,良好地捕获了产物,生成
乙烯二
硫-1,3-二
硫丰烯。