Preparation of enantiomerically pure derivatives of (3-amino-1,2-dicarba-closo-dodecaboran-1-yl)acetic acid
作者:Dmitry A. Gruzdev、Veronika O. Ustinova、Evgeny N. Chulakov、Valentina A. Ol'shevskaya、Pavel A. Slepukhin、Galina L. Levit、Victor P. Krasnov、Valery N. Charushin
DOI:10.1016/j.jorganchem.2018.08.018
日期:2018.12
enantiomerically pure N- and C-protected derivatives of planar-chiral (3-amino-1,2-dicarba-closo-dodecaboran-1-yl)acetic acid (>99% ee) have first been obtained in good yields via a combination of HPLC separation and synthetic procedures. Assignment of absolute configuration of the carborane fragments has been made based on the X-ray diffraction data of diastereoisomeric derivatives of (S)-amino acids
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