Reaction of 1-acetyl-3-indolinone (1-acetylindoxyl) and ketenethioacetals, in the presence of sodium hydride, afforded 2-vinylindole derivatives (II, X) substituted with a methylthio group, accompanied with (3H)-pyrrolo[1, 2-a]indol-3-one derivative (III). Treatment of II with hydrochloric acid or triethylamine gave cyclized products, pyrano-[3, 2-b]indole derivatives and (3H)-pyrrolo[1, 2-a]indol-3-one derivatives.
在
氢化
钠存在下,1-
乙酰基-3-
吲哚啉酮(1-
乙酰基吲哚啉)和
硫代
酮乙醛反应,得到了被甲
硫基取代的 2-
乙烯基吲哚衍
生物(II,X),以及 (3H)-pyrrolo[1, 2-a]indol-3-one 衍
生物(III)。用
盐酸或
三乙胺处理 II,可得到环化产物、
吡喃并[3,2-b]
吲哚衍
生物和 (3H)-
吡咯并[1,2-a]
吲哚-3-
酮衍
生物。