Synthesis of some functional derivatives ofo- andm-carboranes
摘要:
Amides, amines, and alcohols were synthesized from 9-o- and 9-m-carboranecarboxylic chlorides. It follows from comparison of the H-1 NMR spectra of N,N-dimethyl-1-o- and -1-m-carboranecarboxamides and N,N-dimethyl-9-o- and -9-m-carboranecarboxamides that pi-bonding of the carborane polyhedron with the carbonyl group in 1-carboranyl dimethylamides is stronger than that in 9-carboranyl diethylamides. Oxidation of 9-hydroxymethyl-m-carborane with pyridinium chlorochromate gives 9-m-carboranylmethyl 9-m-carboranecarboxylate.
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
Use of carborane carboxylic acids in the synthesis of boronated nitrogen heterocycles
作者:Valentina A. Ol’shevskaya、Anton V. Makarenkov、Elena G. Kononova、Pavel V. Petrovskii、Mikhail S. Grigoriev、Valery N. Kalinin
DOI:10.1016/j.poly.2012.12.035
日期:2013.3
of 5-substituted carborane tetrazoles was synthesized by acylation of 5-phenyl-1-H-tetrazole with the available o- and m-carborane carboxylic acid chlorides or o- and m-carborane acetic acid chlorides in the presence of pyridine. Successive thermolysis of the carborane tetrazoles in toluene followed by the extrusion of nitrogen resulted in a series of previously unknown carborane 1,3,4-oxadiazoles