Aza-annulation of β-enaminolactones: application to the synthesis of enantiopure difunctionalized bicyclic lactams
作者:Jeanne Alladoum、Valérie Toum、Séverine Hebbe、Catherine Kadouri-Puchot、Luc Dechoux
DOI:10.1016/j.tetlet.2008.11.070
日期:2009.2
Diastereoselective aza-annulation of seven-membered β-enaminolactones 2 gives access to bicyclic heterocyles 5. Fragmentation of molecule 5a with lithium methoxide affords cis or trans bicyclic lactams 8 with excellent stereoselectivities.
七元β-烯胺内酯2的非对映选择性氮杂-环空可访问双环杂环5。用甲醇锂裂解分子5a,得到具有优异立体选择性的顺式或反式双环内酰胺8。