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[摘要]：A review. The 1,3-dipolar cycloaddn. of azomethine ylides is a versatile and efficient tool for the construction of five-membered nitrogen heterocycles. When the azomethine ylide is conjugated with double bonds other pericyclic pathways become available, including 1,5- or 1,7-electrocyclizations, with the latter 8p-electron process having only recently emerged as a potentially useful method for the formation of seven-membered heterocycles. Under special structural circumstances, multistep rearrangements can also be obsd. In this account, a summary of the authors' work on the exploration and development of 1,7-electrocyclizations of azomethine ylides is presented. |
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