An effective regioselective electrophilic halogenation of tricyclo[5.2.1.02,6]decenyl enaminones
作者:Namakkal G. Ramesh、Erik H. Heijne、Antonius J.H. Klunder、Binne Zwanenburg
DOI:10.1016/s0040-4039(98)00474-2
日期:1998.5
4 undergo a surprisingly effective regioselective halogenation using N-halosuccinimides (NXS) under electrophilic conditions. Exclusive α-halogenation is observed using one equiv. of NXS, whereas, either α,γ- or α,N-bishalogenation products are formed in quantitative yields when an additional equiv. of NXS is applied. Most importantly, halogenation of the C8C9 norbornene bond is not observed.
使用N-卤代琥珀酰亚胺(NXS)在亲电子条件下,对5-氨基-内环-三环[5.2.1.0 2,6 ] deca-4,8-dien-3-ones 4进行了令人惊讶的有效区域选择性卤化。使用一个当量可观察到排他性的α-卤代。当额外当量时,α,γ-或α,N-双卤代产物以定量收率形成。NXS的应用。最重要的是,作为C卤化8 C 9降冰片烯键未观察到。