期刊
SYNLETT
卷 -, 期 9, 页码 1269-1278出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2008-1072743
关键词
azomethine ylides; electrocyclization; heterocycles
The 1,3-dipolar cycloaddition 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 87 pi-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 observed. In this account, a summary of our work on the exploration and development of 1,7-electrocyclizations of azomethine ylides is presented.
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