Vanillin is synthesized via bromination, methoxylation and purification processes with p-hydroxybenzalde-hyde, bromine and sodium methoxide as raw materials, and the yield is up to 76% .

• 以对羟基苯甲醛、溴素和甲醇钠为原料,经过单溴化、甲氧基化反应和精制过程合成香兰素,收率可达76%25。