XY–ZH Compounds as potential 1,3-Dipoles.
作者:Moustafa F. Aly、Galal M. El-Nagger、Talaat I. El-Emary、Ronald Grigg、Saoud A.M. Metwally、Sasikala Sivagnanam
DOI:10.1016/s0040-4020(01)80804-8
日期:1994.1
In situ formation of imines from α-amino acids and alloxan or pyrazolin-4,5-diones results in decarboxylation forming azomethine ylides which can be trapped as their cycloadducts with maleimides. In the absence of maleimides alloxan gives murexide and the pyrazoline-4,5-diones give rubazonic acid derivatives. The latter are reformulated as stable azomethine ylides. Methyl glycinate reacts with a pyrazolin-4
由α-氨基酸和四氧嘧啶或吡唑啉-4,5-二酮在原位形成亚胺会导致脱羧反应生成偶氮甲亚胺,可与马来酰亚胺一起作为环加成物捕集。在不存在马来酰亚胺的情况下,四氧嘧啶产生了莫来塞德,吡唑啉-4,5-二酮产生了延胡索酸衍生物。后者被重新配制为稳定的偶氮甲亚胺。甘氨酸甲酯与吡唑啉-4,5-二酮和马来酰亚胺反应,通过酯稳定的偶氮甲亚胺叶立德产生环加合物。