Synthesis of Annulated<i>γ</i>-Lactams via Intramolecular 1,3-Dipolar Cycloadditions of Functionalized<i>N</i>-Allyl<i>α</i>-Diazo Amides
作者:Toru Minami、Masashi Kamitamari、Tomohisa Utsunomiya、Tetsuya Tanaka、Junji Ichikawa
DOI:10.1246/bcsj.66.1496
日期:1993.5
N-Allyldiazoacetamides containing a phosphinyl group at the α-position underwent the intramolecular 1,3-cycloaddition, followed by 1,3-hydrogen shift to afford 6a-diethoxyphosphinyl-3a,4,5,6a-tetrahydropyrrolo[3,4-c]pyrazol-6(1H)-ones in 74—78% yields, while the corresponding α-phenylthio amide produced 1-phenylthio-3-azabicyclo[3.1.0]hexan-2-one in 74% yield via extrusion of N2 from the intramolecular 1,3-cycloadduct. In the application of these compounds to the conversion of functionality, the former gave a fused tricyclic heterocycle and the latter gave deallylated compounds.
在 α 位含有氧膦基的 N-烯丙基重氮乙酰胺经过分子内 1,3-环加成,然后进行 1,3-氢转移,得到 6a-二乙氧基氧膦基-3a,4,5,6a-四氢吡咯并[3,4-c ]吡唑-6(1H)-酮,产率 74—78%,而相应的 α-苯硫基酰胺通过从 N2 中挤出,生成 1-苯硫基-3-氮杂双环[3.1.0]己-2-酮,产率 74%分子内1,3-环加合物。在这些化合物用于官能团转化的应用中,前者得到稠合三环杂环,后者得到脱烯丙基化化合物。