A series of 2, 3-diphenyl-5-(naphthalen-1-yl)-4H-2, 3, 3a, 5, 6, 6a-hexahydropyrrolo [3, 4-d] isoxazole-4, 6-dione derivatives were synthesized via 1, 3-dipolar cycloaddition of azomethine N-oxides with N-(α-naphthyl) maleimide. The pyrrolo-isoxazole derivatives were assigned cis-and trans-configurations (3-A and 3-B) with respect to proton C3-H on azomethinic carbon on the basis of their 1H NMR. The reaction proceeds through cis- ...