2-amino-6-(1-hydroxyethyl)phenol 、
方酸二乙酯 在
silica gel 、 300G 、 ethyl acetate heptane 作用下,
以
乙醇 为溶剂,
反应 18.0h,
以800 mg of 3-ethoxy-4-[2-hydroxy-3-(1-hydroxyethyl)phenylamino]cyclobut-3-ene-1,2-dione were obtained in the form of an orange solid的产率得到3-ethoxy-4-[2-hydroxy-3-(1-hydroxyethyl)phenylamino]cyclobut-3-ene-1,2-dione