Synthesis of some isomeric 4,11-dihydro-5H-[1]benzoxocino[4,3-d] or [3,4-c]isoxazol-5-ones and isomeric 4,5,10,11-tetrahydrobenzo[5,6]-cycloocta[2,1-d] or [1,2-c]isoxazol-5-ones

The title compounds were prepared by acid-catalyzed cyclization of aryloxymethyl- or (2-arylethyl)-4-carboxymethylisoxazoles which in turn were synthesized from aryloxymethyl- or (2-arylethyl)isoxazole-4-carboxylic acids by Arndt-Eistert homologation.