3-氰基-4-羟基吲哚 、 1-(3-cyanoindol-4-yloxy)-2,3-epoxypropane 、 2-(2-allyloxyphenoxy)-ethylamine 以to give the pharmacologically effective 4-{2-hydroxy-3-[2-(2-allyloxyphenoxy)-ethylamino]-propoxy}-3-cyanoindole (see Example 3h) of Federal Republic of Germany Patent Specification No的产率得到4-{2-Hydroxy-3-[2-(2-allyloxyphenoxy)-ethylamino]-propoxy}-3-cyanoindole