Studies on organophosphorus compounds 80. Stereoselective synthesis of fused carbocyclic and isoxazoline rings via intramolecular cycloaddition of nitrile oxides derived from α-nitroalkenes
作者:Chengye Yuan、Chaozhong Li
DOI:10.1016/s0040-4039(00)73826-3
日期:1993.9
Stereoselective condensation of alk-3-en-1-ylphosphonates with α -nitroalkenes gave the corresponding nitro compounds, which led to the stereoselective synthesis of 6-aryl-3,3a,4,5,6-pentahydrocyclopent[c]-isoxazole-5-ylphosphonates via intramolecular nitrile oxide -olefin cylco-addition in good yield. Cyclohex-2′-en-1′-ylmethylphosphonate behaves analogously.
烷基-3-烯-1-基膦酸酯与α-硝基烯烃的立体选择性缩合反应生成相应的硝基化合物,从而导致立体选择性合成6-芳基-3,3a,4,5,6-五氢环戊[c]-异恶唑-通过分子内一氧化氮-烯烃环加成的5-基膦酸酯具有良好的收率。Cyclohex-2'-en-1'-甲基膦酸酯的行为类似。