Piezoactive amino acid derivatives containing fragments of planar-chiral <i>ortho</i>-carboranes
作者:Dmitry A. Gruzdev、Alla S. Nuraeva、Pavel A. Slepukhin、Galina L. Levit、Pavel S. Zelenovskiy、Vladimir Ya. Shur、Victor P. Krasnov
DOI:10.1039/c8tc02266f
日期:——
A series of novel (S)-amino acid derivatives bearing planar-chiral (3-acylamino-1,2-dicarba-closo-dodecaboran-1-yl)acetyl substituents was synthesized. Carboranyl amino esters were obtained in a diastereomerically pure form (according to chiral HPLC). Single crystals of individual diastereomers were studied by optical microscopy, X-ray diffraction analysis and piezoresponse force microscopy. The piezoelectric
Synthesis of carborane analogues of γ-aminobutanoic acid
作者:Valentina A. Ol’shevskaya、Rami Ayuob、Zhanna G. Brechko、Pavel V. Petrovskii、Elena G. Kononova、Galina L. Levit、Victor P. Krasnov、Valery N. Charushin、Oleg N. Chupakhin、Valery N. Kalinin
DOI:10.1016/j.jorganchem.2005.01.056
日期:2005.6
preparation of high yields of novel N-protected carborane amino acid derivatives, 3-acylamino-1-carboxymethyl-2-R-o-carboranes (R = H, Me, Ph), is reported. The synthesis starts from readily available 3-amino-o-carboranes and includes the protection of amino group, introduction of carboxymethyl function to the carbon atom of polyhedron via the metallation of carborane CH bond with sodium amide in liquid ammonia