Synthesis of spirocyclic heterocycles from α,β-unsaturated <i>N</i>-acyliminium ions
作者:Thanphat Thaima、Arife Yazici、Chiramet Auranwiwat、Anthony C. Willis、Uta Wille、Thunwadee Limtharakul、Stephen. G. Pyne
DOI:10.1039/d0ob02075c
日期:——
The reactions of α,β-unsaturated N-acyliminium ions, generated in situ from 4(S)-O-substitutedhydroxy-5-hydroxy-5-vinyl-N-alkylpyrrolidin-2-ones, with allylsilanes and indoles leading to the formation of spirocyclic heterocycles, are reported. Six single crystal X-ray structures and extensive 2D NMR experiments confirmed the structures and stereochemistries of these products. In addition, computational
由4(S)-O-取代的羟基-5-羟基-5-乙烯基-N-烷基吡咯烷酮-2-酮原位产生的α,β-不饱和N-酰基亚胺离子与烯丙基硅烷和吲哚的反应导致形成螺环杂环的报道。六个单晶X射线结构和广泛的2D NMR实验证实了这些产品的结构和立体化学。此外,计算研究还提供了机械学见解和对这些反应的立体化学结果的理解。