The present invention relates to a process for preparation of intermediates (Z,2E)-5-hydroxy-2-methoxyimino-N-methyl-pent-3-enamides from 4-substituted 5-meth-oxyimino-2H-pyran-6-ones and their processing for example to (Z)-5-cyclyloxy-2-[(E)-methoxyimino]-3-methyl-pent-3-enic acid methyl amides. The invention also relates to a process for preparation of 4-substituted 5-imino-2H-pyran-6-ones and to novel intermediates for the preparation of fungicidal (Z)-5-cyclyloxy-2-[(E)-methoxyimino]-3-methyl-pent-3-enic acid methyl amides.
该发明涉及一种制备中间体(Z,2E)-5-羟基-2-甲氧基
亚胺-N-甲基-戊-3-烯酰胺的方法,该方法是从4-取代的5-甲氧基
亚胺-
2H-吡喃-6-酮出发,并将其用于制备(Z)-5-环氧基-2-[(E)-甲氧基
亚胺]-3-甲基-戊-3-烯酸甲酰胺。该发明还涉及一种制备4-取代的5-
亚胺-
2H-吡喃-6-酮的方法,以及用于制备杀菌剂(Z)-5-环氧基-2-[(E)-甲氧基
亚胺]-3-甲基-戊-3-烯酸甲酰胺的新型中间体。