1,3-Dipolar cycloaddition of several azomethine ylides to [60]fullerene: synthesis of derivatives of 2′,5′-dihydro-1′H-pyrrolo[3′,4′ : 1,2][60]fullerene 1
作者:Shi-Hui Wu、Wei-Quan Sun、Dan-Wei Zhang、Lian-He Shu、Hou-Ming Wu、Jing-Fei Xu、Xia-Fei Lao
DOI:10.1039/a705962k
日期:——
which reacts with [60]fullerene to afford ethyl 2′,5′-dihydro-1′H-pyrrolo[3′,4′∶1,2][60]fullerene-2′-carboxylate 5. 2-Phenyl-4,5-dihydrooxazol-5-one 6 tautomerizes thermally to form the mesoionic oxazolium 5-oxide 6a, which then, as a cyclic azomethine ylide, combines further with [60]fullerene to give 5′-phenyl-2′H-pyrrolo[3′,4′∶1,2][60]fullerene 7 which possesses Cs symmetry.
亚胺1是通过苯甲醛与相应的伯胺的缩合制备的,其中引入了酯基,膦酸酯基和二肽。[60]富勒烯通过1,3-偶极环加成反应与亚胺1反应,得到富勒烯稠合的脯氨酸衍生物2的相应异构体。1,3,5-三(乙氧羰基甲基)过氢-1,3,5-三嗪4(已通过甘氨酸乙酯与多聚甲醛的缩合反应制得)进行热解聚反应制得甲亚胺叶立德,其与[60]富勒烯反应生成乙基2',5'-二氢-1' ħ-吡咯并[3',4'1:1,2] [60]富勒烯-2'-羧酸盐5. 2-苯基-4,5-二氢恶唑-5-酮6热互变异构以形成中离子性5-氧杂唑鎓6a,然后,作为循环偶氮甲碱内鎓盐,进一步与联合机[60]富勒烯,得到5'-苯基-2' ħ吡咯并[3',4':1,2] [60]富勒烯7其具有ç小号对称性。