Abstract Nucleophilic attack of 8-substituted indeno [1, 2-c] isoxazol-7-ones (1) and 3- phenylindeno [1, 2-c] isoxazol-4-one (4) by dimethylsulfoxide or triphenylphosphine results in cleavage of the nitrogen [BOND] oxygen bond of the isoxazole ring leading to the formation of sulfoximides (2 and 5) and phosphazenes (3 and 8).
![Bis[(2H3)methyl] sulfone Structure](https://image.chemsrc.com/caspic/201/22230-82-6.png)
![3-phenylspiro[azirine-2,2'-indene]-1',3'-dione Structure](https://image.chemsrc.com/caspic/133/53919-51-0.png)
