Enantioenriched β-lactams are accessed via enantioselective allylation of anilines with Morita–Baylis–Hillman carbonates followed by a base-promoted cyclization. The resulting 3-methyleneazetidin-2-ones are amenable to diastereoselective functionalization to produce analogues of biologically active β-lactams. The use of nearly equimolar quantities of the starting materials make this method efficient and straightforward.
通过对苯胺进行对映选择性烯丙基化反应制备富含对映体的β-内酰胺,随后通过碱促进的环化反应得到。所得的3-亚甲基氮杂环丙酮可通过对映选择性官能化反应产生生物活性β-内酰胺类似物。该方法使用接近等摩尔量的起始原料使得该方法高效且简单。