Organoboron compounds

Conclusions The reaction of BCl₃ with N,N'-diphenylacetamidine in boiling benzene with treatment of the reaction mixture with water, methanol, or carboxylic acide yields derivatives of 4,4-dihydroxy-2-methyl-3-phenyl-1,4-dihydro-1-aza-3-azonia-4-boratonaphthalene.Deceased.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 428–430, February, 1985.     

Pion distribution amplitudes within the instanton model of QCD vacuum

The pion transition form factor for the process γ*γ* → π⁰ at spacelike values of photon momenta is calculated within the effective quark-meson model with the interaction induced by instanton exchange. The leading and next-to-leading order power asymptotics of the form factor and the relation between the light-cone pion distribution amplitudes of twists 2 and 4 and the dynamically generated quark mass are found.     

Organoboron compounds Communication 402. Structure of the products of the reaction of N2-Diisopropylboryl-N1-alkylbenzamidines with phenyl isonitrile

Conclusions The reaction of N²-diisopropylboryl-N¹-alkylbenzamidines with phenyl isonitrile leads to 1-alkyl-2-phenyl-4,4-diisopropyl-5-phenylimino-1-aza-3-azonia-4-borata-2-cyclopentenes. The structures of these products were demonstrated using x-ray diffraction structural analysis.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2370–2375, October, 1982.     

Reaction of dialkylboric anhydrides with 2-amino- and 2-hydroxypyridine

Conclusions The anhydrides of dialkylboric acids react with 2-aminopyridine at 150–190° and with 2-hydroxypyridine at 100–170° to give cyclic coordination compounds of boron and saturated hydrocarbons.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1919–1921, August, 1977.     

Synthesis of compounds with a four-coordinate boron atom from 2-aminobenzazoles and nitriles

The reactions of 2-aminobenzazoles with nitriles in the presense of organoboranes results in the formation of novel tricyclic chelate boron compounds with N-(benzazol-2-yl)amidines as ligands, N-(Benzothiazol-2-yl)-p-chlorobenzamidine was prepared from 2-aminobenzothiazole and p-chlorobenzonitrile via the corresponding chelate.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 1019–1021, April,.     

Synthesis of 4-hydroxy- and 3-aryl-4-amino- 2-trifluoromethylpyridines

Schemes for synthesizing 3-acyl-4-amino(hydroxy)-2-trifluoromethylpyridines from 3-acyl 4-amino-5,5,5-trifluoro-3-penten-2-ones via their diphenylboron chelate complexes have been suggested.Translated fromlzvestiyn Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2715–2718, November, 1996,     

Reactions of cyanofurazans with β-dicarbonyl compounds

In the presence of nickel acetylacetonate, -dicarbonyl compounds readily add at the nitrile group of 4-R-3-cyanofurazans to form enaminofurazans. The adducts obtained from 4-amino-3-cyanofurazan underwent intramolecular cyclization on heating with AcOH in EtOH to give furazano[3,4-b]pyridine derivatives in high yields.     

2-Alkoxy-1,2-oxaborolanes

Summary 2-Alkoxy-1,2-oxaborolanes were synthesized by simple methods, and their transesterification reactions were investigated.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 1661–1663, September, 1965