4H-1-BENZOPYRAN-4-ONES AND THEIR SULFUR CONTAINING ANALOGS,THEIR PHARMACEUTICAL COMPOSITION AND METHOD OF USING SAID COMPOUND

摘要

There are disclosed novel 4H-1-benzopyran-4-ones and their sulphur containing analogs which are effecacious for the treatment of psychosis including schizophrenia. The compounds have the formula (I) …… wherein X is oxygen or sulfur, n is 2, 3, 4 or 5 and R is …… in which Ar is an aryl.