investigated under different conditions. With different anions of malonates containing dipolarphiles, cyclic compounds were obtained as major products indicating nitrile oxides were generated during the reaction. Based on the results, compared to that of the one reported in literature, a plausible mechanism involving nitrile oxide intermediate was proposed.
使用
β-硝基苯乙烯和
丙二酸二甲酯的阴离子在THF中于0°C生成
硝酸盐。随后在THF或
吡啶中存在/不存在
DMAP的情况下用PCl 3处理,得到硝基烷,
氯肟和腈。在不同条件下研究了
吡啶,THF和THF-
吡啶共溶剂作为溶剂。用含有双极性亲电子的
丙二酸根的不同阴离子,获得了环状化合物作为主要产物,表明在反应过程中产生了腈氧化物。根据这些结果,与文献报道的结果相比,提出了一种涉及
一氧化氮中间体的合理机理。