Azaspiro compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently represent hydrogen, a hydrocarbon residue which may have a substituent, or an acyl group which may have a substituent; R.sub.3 represents hydrogen or a hydrocarbon residue which may have a substituent; each of X.sub.1 and X.sub.2 is oxygen or sulfur; Y represents oxygen, sulfur or a group of the formula: --N(R.sub.4)--, wherein R.sub.4 represents hydrogen or a lower alkyl group; m represents 0 or 1; n represents 0 or 1, and its salt are novel compounds, possess excellent brain function-improving action, and are of use as drugs for the prevention and therapy of senile dementia of Alzheimer type, vascular-type dementia and dementia derived from Alzheimer's disease, Pick's disease, Huntington's disease, Creutzfeldt-Jakob's disease, Parkinson's disease and spinocerebellar degeneration.
公式为 ##STR1## 的Azaspiro化合物,其中R.sub.1和R.sub.2分别代表氢,可能具有取代基的碳氢残基或可能具有取代基的酰基;R.sub.3代表氢或可能具有取代基的碳氢残基;X.sub.1和X.sub.2中的每一个代表氧或
硫;Y代表氧、
硫或公式为--N(R.sub.4)--的基团,其中R.sub.4代表氢或较低的烷基;m代表0或1;n代表0或1。这些化合物的盐是新的化合物,具有出色的改善脑功能的作用,可用作预防和治疗老年性阿尔茨海默病、血管型痴呆和由阿尔茨海默病、皮克氏病、亨廷顿病、克劳德-雅各布病、帕
金森病和脊髓小脑变性引起的痴呆症的药物。