The substituted 4H-pyrans are prepared by reacting either aldehydes or ylidene compounds with suitably substituted .beta.-diketones. The substituted 4H-pyrans according to the invention are suitable as active compounds in medicaments, in particular for the treatment of disorders of the central nervous system.
通过将醛类化合物或叶立烯化合物与适当取代的
β-二酮反应制备取代的
4H-吡喃。根据本发明的取代的
4H-吡喃适用作为药物中的活性化合物,特别用于治疗中枢神经系统疾病。