名称:
                                Transformations of Dimethyl (2E,3E)-2-[(Dimethylamino)methylene]-3-(1-methyl-2,5-dioxoimidazolidin-4-ylidene)succinate with C-Nucleophiles
                             
                            
                                摘要:
                                (2E,3E)-2-[(Dimethylamino)methylene]-3-(1-methyl-2,5-dioxoimidazoli din-4-ylidene)succinate (1)经由1,3-二羰基化合物2a,b通过取代的二甲基(2H-咪唑-4-基)-2-丁烯二酸酯3a,b和二甲基(2,5-二氧基-4-咪唑烷基亚基)succinates4a,b转化为2H-吡喃[2,3-d]吡啶-6,7-二羧酸酯5a,b。化合物1在冰醋酸中加热环化为二甲基1H-吡咯[1,2-c]咪唑-6,7-二羧酸酯(8)。