Abstract N-Phenylsalicylohydroxamic acids, salicylohydroxamic acids, o- hydroxyacetophenone oximes and salicylaldoximes gave the corresponding N-phenyl-1, 2- benzisoxazol-3 (2H)-ones, 1, 2-benzisoxazol-3-ols, 3-methyl-1, 2-benzisoxazoles and 1, 2- benzisoxazoles when treated with thionyl chloride in the presence of dry pyridine in anhydrous ether at 0 C.