Pterostilbene pyridine salt compound, intermediate compound, composition, medicine, preparation method and application

The invention provides a pterostilbene pyridine salt compound, an intermediate compound, a composition, a medicine, a preparation method and application, and belongs to the technical field of medicinal chemistry. The compound provided by the invention has a structural formula as shown in a formula I, r is selected from one or more of hydrogen, deuterium, optionally substituted or unsubstituted alkyl, optionally substituted or unsubstituted alkenyl, optionally substituted or unsubstituted alkynyl, optionally substituted or unsubstituted alkoxy, optionally substituted or unsubstituted cycloalkyl, optionally substituted or unsubstituted aryl and optionally substituted or unsubstituted heteroaryl; x is selected from chlorine, bromine, fluorine or iodine. The compound provided by the invention has a good inhibition effect on plant pathogenic bacteria and fungi, and has a remarkable inhibition effect on tobacco mosaic virus, cucumber mosaic virus, cauliflower mosaic virus and potato Y virus. 本发明提供了一种紫檀芪吡啶盐类化合物、中间体化