METHOD OF PREPARING SPIROPYRANE COMPOUNDS

摘要

PURPOSE:Spiropyrane compounds of formula I -(Z is S, NR<1>;R<1> is alkyl, aralkyl, aryl, acyl; Y is O, NR<2>;R<2> is alkyl, aralkyl, aryl, in the proviso that when Y is O, X is not acyl); for example, 1',3',4',-triphenylspiro [2H-benzopyrane-2, 5,-( <2>-1,2,4)triazone].