Synthesis of 1-nitro-1,3-dienes via nitrotrifluoroacetoxylation of 1,3-dienes
作者:A. Jon Bloom、John M. Mellor
DOI:10.1016/s0040-4039(00)84124-6
日期:1986.1
Nitrotrifluoroacetate adducts, obtained from 1,3-dienes by reaction with ammoniumnitrate in trifluoroaceticanhydride, readily eliminate to afford 1-nitro-1,3-dienes in high yield.
Total syntheses of heliotridane and pseudoheliotridane through nitrodiene–acrylate 6π-electrocyclization/[3+2] cycloaddition
作者:Esra Koc、Ohyun Kwon
DOI:10.1016/j.tet.2016.12.056
日期:2017.7
The total syntheses of the pyrrolizidine alkaloids heliotridane and pseudoheliotridane have been accomplished in six steps (overall yields: 24 and 7%, respectively) using, for the first time, the tandem 6π-electrocyclization/[3+2] dipolar cycloaddition of an acyclic nitrodiene, 1-nitro-2-methyl-1,3-butadiene.