abstract |
The invention relates to novel 6-aryloxy-2-oxo-1-aza-4-(or thia)-spiro[4,5]decane compounds. These compounds are represented by the formula: <IMAGE> (I) in which A stands for an oxygen or sulfur heteroatom; R1 and R2 are each H, lower alkyl or aryl such as phenyl; X is H, a halogen atom such as chlorine or fluorine or a lower alkyl. |