Formylation of 4-hydroxy-6-methyl-2(1H)-pyridones and subsequent cyclization with a Wittig reagent or with CH-acidic esters gave a series of title compounds. The same starting pyridones reacted with methyl 3-amino-2-butenoate directly to the corresponding 4,7-dimethylpyrano[3,2-c]pyridines.
摘要
4-羟基-6-甲基-2(1H)-
吡啶酮的甲酰化和随后用维蒂希试剂或CH-酸酯环化得到一系列标题化合物。相同的起始
吡啶酮与 3-
氨基-
2-丁烯酸甲酯直接反应生成相应的 4,7-二甲基
吡喃并 [3,2-c]
吡啶。