Ketone–ketone cross-aldolreaction of isatins and unactivated ketones was catalyzed by glucose-containing imidazolium salt β-1-imidazole-2,3,4,6-tetra- o -hydroxy- d -glucopyranosyl bromide in neutral condition to generate 3-alkyl-3-hydroxyindolin-2-ones in excellent yield.
含葡萄糖的咪唑鎓盐β-1-咪唑-2,3,4,6-四氢呋喃-丁酮催化靛红与未活化酮的酮-酮交叉羟醛反应。 Ø -羟基- d -葡糖吡喃糖基溴在中性条件下生成3-烷基-3-羟基吲哚-2-酮的产率很高。
POPP F. D.; DONIGAN B. E., J. PHARM. SCI., 1979, 68, NO 4, 519-520