A new efficient γ-lactams 4 synthesis was achieved by two successive reactions: alkylation of nitroalkane anions with dimethyl α-(bromomethyl) fumarate 1 leading to the formation of (E)-1-alkyl-2,3-dimethoxycarbonyl butadienes 3a,b resulting of tandem alkylation–elimination (dehydronitration) processes, followed by an intramolecular cyclization on addition of primary amine.
通过两个连续的反应实现了新的高效γ-内酰胺4合成:硝基
烷烃阴离子与
富马酸二甲酯α-(
溴甲基)
富马酸酯1的烷基化,导致形成(E)-1-烷基-
2,3-二甲氧基羰基
丁二烯3a,b串联烷基化-消除(脱氢硝化)过程产生的结果,然后通过添加
伯胺进行分子内环化。