4-Methylbenzoylchlorid-2,4,6-trichlorphenylhydrazon 、 trispiro[tetrahydropyran-4,5'-2H-chromeno-[3,4-e]-1,3,4'-oxadithiin-2',3''-chroman-2''4'''-tetrahydropyran]-4''-one 在
三乙胺 作用下,
以
甲苯 为溶剂,
反应 10.0h,
以62%的产率得到3''-(2,4,6-trichlorophenyl)-5''-(4-tolyl)-3''H-dispiro[chroman-2',4-tetrahydropyran-3',2''-[1,3,4-thiadiazol]]-4'-one