Cycloadditions of 2-nitro 1,3-dienes to enamines. Asymmetric induction and synthesis of unsaturated nitroketones and diels-alder adducts via [4+2] heterocyloadditions.
作者:Rafael Chinchilla、Jan-E. Bäckvall
DOI:10.1016/s0040-4039(00)61168-1
日期:1992.9
situ from the corresponding nitroseleno compounds, react with enamines affording [4+2] heterocycloadducts of different stability. With chiral enamines a high asymmetricinduction was observed in some cases. Some of the adducts were readily hydrolyzed to unsaturated γ-nitroketones whereas others spontaneously rearranged to Diels-Alder-type carbocycloadducts.