Abstract In this communication, we wish to report the synthesis of some new spiro-4- oxazolidinones. Treatment of the potassium salt of 2-methyl-cyclohexane-1, 3-dione (1) with α-chloroacetanilides (2 ac) gave 4-aryl-6-methyl-1-oxa-4-aza-spiro [4, 5] deca-3, 7-diones (3 ac); and with α-halopropionanilides (2 d, e), the corresponding 4-aryl-2, 6-dimethyl-1-oxa-4- aza-spiro [4, 5] deca-3, 7-diones (3 d, e) were obtained.
![6-methyl-4-(4-methylphenyl)-1-oxa-4-azaspiro[4.5]decane-3,7-dione Structure](https://image.chemsrc.com/caspic/071/65226-83-7.png)