Rearrangement ofα -trifluoromethyl-β-dialkylamino-β-fluoroacrylic acid N.N-dialkylamides

Conclusions When heated in the presence of a catalytic amount of BF₃ etherate,-trifluoromethyl--diethylamino--fluoroacrylic acid N, N-dimethylamide is reversibly isomerized to-trifluoromethyl--dimethylamino--fluoroacrylic acid N, N-diethylamide. The methyl esters of-trifluoromethyl--diethylammo--fluoroacrylic acid and-trifluoromethyl--phenoxy--fluoroacrylic acid N,N-dimethylamide are not isomerized under the same conditions.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No.1, pp.137–141, January, 1976.     

Dehydrofluorination with triethylamine-boron trifluoride adduct. New synthesis of perfluoromethacrylic acid derivatives and related compounds

Adduct (C₂H₅)₃N·BF₃ has proved to be a suitable dehydrofluorinating reagent for preparing highly reactive fluoroolefines through dehydrofluorination of corresponding monohydro derivatives. Its advantage over other dehydrofluorinating agents are demonstrated by the synthesis of a number of perfluoromethacrylic acid derivatives.     

Compact and Monotone Difference Schemes for the Generalized Fisher Equation

Differential Equations - For the generalized Fisher equation with nonlinear convection, monotone and compact difference schemes of $$4+1$$ and $$4+2 $$ approximation orders are constructed and...     

Synthesis of difluoromethylenemalonic acid esters and their reactions with trialkyl phosphites

Russian Chemical Bulletin -     

Comparison of dispersion properties of some difference schemes for the system of two-dimensional equations of acoustics

We analyze the dispersion properties of three difference schemes approximating the system of two-dimensional equations of acoustics. Comparison of the principal terms in the expansion of the dispersion error indicates that the dispersion properties of the centered scheme proposed by the authors are superior to those of other schemes, including the well-known Lax—Wedroff scheme. Computational results are reported supporting the theoretical conclusions.Kiev University. Nukus University. Translated from Vychislitel'naya i Prikladnaya Matematika, No. 75, pp. 43–50, 1991.