Sandwich structure of a ruthenium porphyrin and an amino acid hydrazide for probing molecular chirality by circular dichroism
作者:Qing-Feng Liang、Juan-Juan Liu、Jian Chen
DOI:10.1016/j.tetlet.2011.05.081
日期:2011.8
Owing to the strong Lewis acidity of ruthenium porphyrins, a commercial carbonyl ruthenium porphyrin and an amino acid hydrazide can assemble into a sandwich structure. The nature of such a structure is diagnostic of the absolute configuration of the amino acid by circular dichroism.
Chiral arylideneaminoimidazolidin-4-ones: green synthesis and isomerisation mechanism in solution
作者:Nadia Bouzayani、Sylvain Marque、Yakdhane Kacem、Jamil Kraïem、Flavien Bourdreux、Jérôme Marrot、Béchir Ben Hassine
DOI:10.1039/c9nj00022d
日期:——
synthetic approach of pure 2,5-disubstituted 3-arylideneaminoimidazolidin-4-ones is developed using water as the solvent. These new chiral arylideneaminoimidazolidin-4-one derivatives were obtained diastereoselectively in high overall yields and with high atom economy via the cyclocondensation of various aromatic aldehydes and α-amino acidhydrazides. Solid state studies were complemented by the behavior