作者:K.S.Keshava Murthy、Alfred Hassner
DOI:10.1016/s0040-4039(00)95659-4
日期:1987.1
Two routes were examined that permit conversion of 4-vinyl-2-azetidinones via intramolecular nitrile oxide-olefin or azide-olefin cycloaddition into tricyclic β-lactams. Stereoselectivity in these cycloadditions as well as further chemoselective transformation of the products were shown to be dependent on the size of the newly formed ring.
研究了两种途径,它们允许4-乙烯基-2-氮杂环丁酮通过分子内的腈氧化物-烯烃或叠氮化物-烯烃的环加成反应转化为三环β-内酰胺。这些环加成物中的立体选择性以及产物的进一步化学选择性转化显示取决于新形成的环的尺寸。