The first fulleropyrrolidine derivative of Sc3N@C80:: Pronounced chemical shift differences of the geminal protons on the pyrrolidine ring

被引：109

作者：

Cardona, CM ^{[1
]}

Kitaygorodskiy, A ^{[1
]}

Ortiz, A ^{[1
]}

Herranz, MA ^{[1
]}

Echegoyen, L ^{[1
]}

机构：

[1] Clemson Univ, Dept Chem, Clemson, SC 29634 USA

来源：

JOURNAL OF ORGANIC CHEMISTRY | 2005年 / 70卷 / 13期

关键词：

D O I：

10.1021/jo0503456

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The first pyrrolidine adduct on SC3N@C-80 was synthesized and fully characterized. Addition of the N-ethylazomethine ylide occurs regioselectively on a [5,6] double bond on the surface of the icosahedral symmetry SC3N@C80, exactly in the same position as that described previously for a Diels-Alder adduct of the same compound.(11a,b) This addition pattern results in symmetric pyrrolidine carbons and unsymmetric geminal hydrogens on the pyrrolidine ring, as confirmed by H-1 and C-13 NMR spectroscopy, especially by HMQC. The shielding environment experienced by these geminal hydrogens differs by 1.26 ppm, indicative of pronounced ring current effects on the surface of this endohedral fullerene. This represents the first fully characterized pyrrolidine adduct on an endohedral metallofullerene.

引用

页码：5092 / 5097

页数：6

共 62 条

[11] Lanthanum endohedral metallofulleropyrrolidines: Synthesis, isolation, and EPR characterization [J].