A Facile Access to Enantiomerically Pure [60]Fullerene Bisadducts with the Inherently Chiral <i>Trans</i>-3 Addition Pattern
作者:Maria Riala、Nikos Chronakis
DOI:10.1021/ol200816z
日期:2011.6.3
acetonide moieties led to the synthesis and successful column chromatographic isolation of the enantiomericallypure f,sC and f,sA bisadducts with the inherently chiral trans-3 addition pattern. Acidic deprotection of the acetonide groups gave access to novel chiral fullerene compounds which combine the inherent chirality of the fullerene core with the functional glycol groups located on the tether.
C 60与对映体纯的双丙二酸酯系链与两个丙酮酸酯部分之间的Bingel反应导致对映体纯的f,s C和f,s A双加合物具有固有的手性反式-3加成模式,从而合成并成功进行了柱色谱分离。乙醛酸基团的酸性脱保护得到了新颖的手性富勒烯化合物,该化合物将富勒烯核的固有手性与位于系链上的官能二醇基团结合在一起。
Remote Functionalization of C<sub>60</sub> with Enantiomerically Pure <i>cyclo</i>-[2]-Malonate Tethers Bearing C12 and C14 Spacers: Synthetic Access to Bisadducts of C<sub>60</sub> with the Inherently Chiral trans-3 Addition Pattern
作者:Maria Riala、Nikos Chronakis
DOI:10.1021/jo4013173
日期:2013.8.2
cyclo-[2]-malonate tethers that were separated by column chromatography in optically pure form. The bismalonates (−)-4b and (−)-9b proved to be excellent tethers for the regioselective Bingel functionalization of C60, furnishing in a regioselective manner the corresponding f,sC and f,sA trans-3 bisadducts with low diastereoselectivity but in very good to excellent total yields. In both cases, the formed trans-3 bisadducts
An unexpected stereoisomerism in enantiomerically pure trisadducts of C60 with an inherently chiral trans-3,trans-3,trans-3 addition pattern
作者:Maria Riala、Nikos Chronakis
DOI:10.1039/c3cc48941h
日期:——
We have synthesized and isolated two C2-symmetric enantiomerically pure trisadducts of C60 with an inherently chiral trans-3,trans-3,trans-3 addition pattern with the aid of an enantiopure cyclo-tris-malonate tether. An unexpected stereoisomerism was observed which was attributed to the spatial arrangement of spacers in the tether.