N-methyl-piperidone was fragmented to the vinylketonic acrylamide by successive treatment with acryloyl chloride and Hunig's base. The 2-azahydrindandione resulted from the cyclization of 9a in the form of its enol dimethylterbutyl ether. N-methyl-azepinone was transformed in a similar way to the two epimeric 2-azadecalindiones + in four steps only.
                                    通过用
丙烯酰氯和Hunig碱连续处理,将
N-甲基哌啶酮片段化成
乙烯基酮
丙烯酰胺。2-氮杂
茚并二酮是由9a的烯醇二
甲基叔丁基醚形式的环化产生的。仅通过四个步骤,以类似于两个差向异构体2-氮杂cal啶二酮+的方式转化N-甲基-
庚酮。