Ferrocenyl substituted oxo-derivatives of carboranes: Synthesis and some chemical transformations
作者:Valentina A. Ol’shevskaya、Maria D. Kotova、Elena G. Kononova、Alexander S. Peregudov、Valery N. Kalinin
DOI:10.1016/j.poly.2014.08.015
日期:2015.1
Abstract Friedel-Crafts acylation reaction of ferrocene with carborane carboxylic acid chlorides was shown to be a facile and convenient route for the preparation of carboranyl ferrocenyl oxo-derivatives in high yield. Compounds thus obtained were easily transformed into the corresponding alcohols using lithium aluminum hydride whereas their conversion into the corresponding ferrocenylalkyl carboranes
Phosphorus derivatives of carboranes as ligands for Pd-catalyzed cross-coupling reactions
作者:A. A. Tyutyunov、S. E. Lyubimov、E. G. Rys、T. A. Verbitskaya、P. V. Petrovskii、V. A. Davankov、V. N. Kalinin
DOI:10.1007/s11172-008-0326-y
日期:2008.11
Carborane-containing phosphine ligands having different steric and electronic properties were synthesized. Testing of these ligands in the Pd-catalyzed Suzuki—Miyaura reaction showed higher catalytic activity for sterically congested phosphine ligands with acceptor carborane substituents.
New carborane-containing amino acids and their derivatives. Crystal structures of n-protected carboranylalaninates
作者:S. V. Timofeev、V. I. Bregadze、S. N. Osipov、I. D. Titanyuk、P. V. Petrovskii、Z. A. Starikova、I. V. Glukhov、I. P. Beletskaya
DOI:10.1007/s11172-007-0118-9
日期:2007.4
New alanine derivatives containing both the carboranyl and trifluoromethyl groups were synthesized by the reaction of organometallic derivatives of o-carborane with methyl trifluoropyruvate imines. When using the 1R-(−)-menthoxycarbonyl protecting group at the nitrogen atom, one of diastereomers was isolated and characterized. Trifluoromethyl-carboranylalanine methyl esters containing different protecting groups at the nitrogen atom were studied by X-ray diffraction. Both complete and partial deprotection of the amino and carboxy groups was performed.
通过邻碳硼烷的有机金属衍生物与三氟丙酮酸甲酯亚胺的反应,合成了含有碳硼酰基和三氟甲基的新丙氨酸衍生物。当在氮原子上使用 1R-(-)-甲氧羰基保护基团时,分离并表征了其中一种非对映异构体。通过 X 射线衍射研究了氮原子上含有不同保护基团的三氟甲基-硼丙氨酸甲酯。对氨基和羧基进行了完全和部分脱保护。
Synthesis and structure of diethyl (1-benzyloxycarbonylamino-1-carboranyl-3,3,3-trifluoropropyl)phosphonate
作者:S. V. Timofeev、E. A. Prikaznova、Z. A. Starikova、S. N. Osipov、V. I. Bregadze
DOI:10.1007/s11172-013-0279-7
日期:2013.8
C-carboranylmethylmagnesium bromide with diethyl (N-benzyloxycarbonyl-2,2,2-trifluoroethaneimidoyl)phosphonate gave P- and N-protected aminophosphonic acid, an organophosphorus analog of alanine. The phosphonate was characterized by 1H, 19F, and 31P NMR spectroscopy. X-ray diffraction analysis of diethyl (1-benzyloxycarbonylamino-1-carboranyl-3,3,3-trifluoropropyl)phosphonate showed that the molecules form dimers