Abstract The synthesis of new 3, 3′-methylenediisoxazoles (III), from 1, 3- dichloromalondioxime (IX) and acetylenic compounds is reported. We have studied the transformation of the chloronitroso compound (VII), obtained from malondioxime (V) in ether with gaseous chlorine at− 70, into IX. It was found that this was possible only by heating a DIYISO solution. The characteristics of the compounds which are described are reported.
![5-butyl-3-[(5-butyl-1,2-oxazol-3-yl)methyl]-1,2-oxazole Structure](https://image.chemsrc.com/caspic/074/62024-86-6.png)
![5-phenyl-3-[(5-phenyl-1,2-oxazol-3-yl)methyl]-1,2-oxazole Structure](https://image.chemsrc.com/caspic/114/22603-83-4.png)