Visible‐Light‐Induced Cycloaddition of α‐Ketoacylsilanes with Imines: Facile Access to β‐Lactams
作者:Jian‐Heng Ye、Peter Bellotti、Tiffany O. Paulisch、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202102451
日期:2021.6.7
report the synthesis of β-lactams from α-ketoacylsilanes and imines, which proceeds via a formal [2+2] photochemical cycloaddition with in situ generation of siloxyketene. This mild and operationally simple reaction proceeds in an atom-economic fashion with broad substrate scope, including aldimines, ketimines, hydrazones, and fused nitrogen heterocycles, affording a variety of important β-lactams with satisfactory
我们报告了由 α-酮酰基硅烷和亚胺合成 β-内酰胺,该合成通过正式的 [2+2] 光化学环加成反应进行,并原位生成甲硅烷氧基乙烯酮。这种温和且操作简单的反应以原子经济方式进行,底物范围广泛,包括醛亚胺、酮亚胺、腙和稠氮杂环,在大多数情况下提供各种具有令人满意的非对映选择性的重要 β-内酰胺。该反应还具有良好的官能团耐受性、易于扩展和产品多样化。实验和计算研究表明,α-酮酰基硅烷可以通过 1,3 硅转移到远端羰基作为光化学前体。