Photochemically Produced Aminocyclobutanes as Masked Dienes in Thermal Electrocyclic Cascade Reactions
作者:Luke D. Elliott、Kevin I. Booker-Milburn
DOI:10.1021/acs.orglett.9b00211
日期:2019.3.1
involving the in situ formation of a cyclobutene, followed by electrocyclic ring opening, Diels–Alder cycloaddition, and subsequent lactamization. This combination of excited state photochemistry and thermal electrocyclic cascade reactions allows simple planar molecules to be rapidly transformed into sp3-rich scaffolds.
已显示三重态敏化的烯酰胺-烯烃分子内[2 + 2]光环加成反应的环丁烷产物在酸性条件下会发生断裂。通过诱导产生复杂性的热电级联序列,包括原位形成环丁烯,随后进行电环开环,Diels-Alder环加成和随后的内酰胺化,来开发这种不稳定性。激发态光化学和热电级联反应的这种组合允许简单的平面分子迅速转化为富含sp 3的支架。