Abstract Indoles undergo conjugate addition with α,β‐unsaturated ketones in the presence of a catalytic amount of antimony trichloride under refluxing condition to afford the corresponding Michael adduct in excellent yields. The substitution on the indole ring occurred exclusively at 3‐position without a trace of any N‐alkylated products.
摘要 在回流条件下,在催化量的
三氯化锑存在下,
吲哚与 α,β-不饱和酮进行共轭加成,得到相应的迈克尔加合物,收率很高。
吲哚环上的取代仅发生在 3 位,没有任何 N-烷基化产物的痕迹。