2,4-Diphenyl-5,6,7,8-tetrahydro-1-benzothiopyrylium perchlorate 、
2,4-Diphenyl-6,7-dihydro-5H-1-benzothiopyran-8-al 在
吡啶 、
乙酸酐 作用下,
以
溶剂黄146 为溶剂,
反应 0.05h,
以50%的产率得到2,4-Diphenyl-8-<<2,4-diphenyl-6,7,-dihydro-5H-1-benzothiopyran-8-yl>-methylidene>-5,6,7,8-tetrahydro-1-benzothiopyrylium Perchlorate