cyclisation of malic acid-derived α-sulfanyllactam (1) via radical and carbanionic intermediates affords stereo-defined tetrahydropyrido[2,1-a]isoindolones as model compounds for the D/E cis-ring fusion of the Tacaman indole alkaloid skeleton. A transition-state model to explain the stereoselectivity is presented.
通过自由基和碳负离子中间体对
苹果酸衍生的α-
磺胺基内酰胺(1)进行立体选择性环化,提供了立体定义的四氢
吡啶并[2,1- a ]异
吲哚并酮作为塔卡曼
吲哚生物碱骨架D / E顺式环融合的模型化合物。提出了解释立体选择性的过渡态模型。