6-Dinitroalkanes have been cyclised to yield vicinal dinitrocyclopentanes via stereoselective intramolecular addition of nitronate anions to α-nitroalkyl radicals. A “cyclohexane type” transition state is proposed for this radical anion cyclisation.
通过将
亚硝酸根阴离子立体选择性地分子内加成到α-硝基烷基基团上,已将2,6-二硝基
烷烃环化以产生邻位的二
硝基环戊烷。对于该自由基阴离子环化,提出了“
环己烷型”过渡态。