Microstructure and Microhardness of a Multicomponent System After Mechanical Activation and Spark Plasma Sintering

Russian Physics Journal -     

Vinyltetrazoles: III. Metal-catalyzed arylation, a new method of vinyltetrazoles functionalization

New functionalization procedure was developed for C- and N-vinyltetrazoles based on Heck reaction. Applying this method diverse (E)-styryl- and (E)-distyryltetrazoles were obtained for the first time in 76?C85% yields. C-Vinyltetrazoles are more reactive in Heck cross-coupling than N-vinyltetrazoles. The arylation of 1-vinyltetrazole along Heck reaction proceeds with a C-H-activation and leads to the formation of 5-phenyl-1-[2-(E)-phenylethenyl]tetrazole.     

Tetrazoles: XLV. Amidoalkylation of 5-Substituted Tetrazoles

Russian Journal of Organic Chemistry -     

The Influence of Duration of Preliminary Mechanical Activation on Microhardness of Specimens of Ni3Al Intermetallide Synthesized Under Conditions of Spark Plasma Sintering

Russian Physics Journal -     

Polynuclear tetrazole-containing amino acid analogs

New analogs of (D,L)-phenylalanine containing tetrazole rings were synthesized. The acidity constants of (D, L)-phenylalanine and (D,L)-tryptophane derivatives containing a tetrazole ring with no substituent on N¹ (pK _a = 3.0–3.1) and of the corresponding carboxylic acids (pK _a = 2.9–3.3) in aqueous methanol were determined by potentiometric titration.Translated from Zhurnal Organicheskoi Khimii, Vol. 40, No. 10, 2004, pp. 1576–1579.Original Russian Text Copyright © 2004 by Morozova, Esikov, Zubarev, Malin, Ostrovskii.