procedure gave a mixture including multiallylated products. In the reaction with N-ylides, gem-C-diallylation and α,α′-C-diallylation of oligoglycinates are strongly inhibited even with the use of an excess of allyl bromide and base. A mechanism to explain this control of the frequency of C-allylation on oligoglycinates via N-ylides is also proposed.
据报道,通过在N-
烯丙基化和C-迁移步骤之间插入真空操作,低
聚甘氨酸酸
酯例如
二亚乙基三胺五乙酸酯,
亚氨基二乙酸酯和
乙二胺四乙酸酯的高选择性单C-
烯丙基化。这是对比的是单罐Ñ -allylation- Ç -allylation地进行反应,包括multiallylated产物的混合物。与反应Ñ -ylides,宝石-C -diallylation和α,α'- Ç oligoglycinates的-diallylation强烈,即使使用过量的
烯丙基
溴和碱的的抑制。一种解释通过以下方式控制
寡糖苷酸上C-
烯丙基化频率的机制还提出了N-基化物。