ethenesulfonic acid 4-hydroxyphenyl ester 、
3-(4-hydroxy-3-methylphenyl)-4-phenylthiophene 在
三氟化硼乙醚 、
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
反应 4.17h,
生成 4-hydroxyphenyl-6-(4-hydroxy-3-methylphenyl)-5-phenyl-7-thiabicyclo[2.2.1]hept-5-ene-2-sulfonate-7-oxide 、 4-hydroxyphenyl-5-(4-hydroxy-3-methylphenyl)-6-phenyl-7-thiabicyclo[2.2.1]hept-5-ene-2-sulfonate-7-oxide