申请人:Bayer Aktiengesellschaft
公开号:US03936444A1
公开(公告)日:1976-02-03
In the production of an aryl lactamhydrazone of the formula ##SPC1## In which A represents optionally substituted alkylene, aralkylene or cycloalkylene, each with up to 20 carbon atoms, and Q represents optionally substituted, mononuclear to trinuclear aryl or an optionally alkylsubstituted mononuclear or binuclear heterocyclic aromatic system with 1 to 3 hetero atoms, In which a lactim-ether of the formula ##SPC2## In which R is aryl or alkyl of 1 to 6 carbon atoms, Is reacted with an arylhydrazine or heteroarylhydrazine of the formula H.sub.2 N--NH--Q (III) the improvement which comprises effecting the reaction at a temperature of about -20.degree. to 150.degree.C and in the presence of at least a catalytic amount of acid, whereby the yield is markedly increased. Those compounds wherein A is --(CH.sub.2).sub.2-11 -- and Q is pyridyl or phenyl substituted by at least one nitro, sulfo, sulfonamido or carboxy group are new and exhibit fungicidal activity.
在制备公式为##SPC1##的芳香内酰肼时,其中A代表选配的含有至多20个碳原子的取代的烷基、芳基烷基或环烷基,而Q代表选配的含有1至3个杂原子的单核到三核芳基或选配的含有1至3个杂原子的烷基取代的单核或双核杂环芳香体系。在此反应中,公式为##SPC2##的内酰醚与公式为H.sub.2 N--NH--Q(III)的芳基肼或杂芳基肼反应,其中R代表1至6个碳原子的芳基或烷基。改进的方法包括在存在至少催化量的酸的情况下,在温度为-20℃至150℃之间进行反应,从而显著提高收率。其中,A为--(CH.sub.2).sub.2-11--,Q为至少取代一个硝基、磺酰基、磺酰胺基或羧基的吡啶基或苯基的化合物是新的,并具有杀真菌活性。