alpha-Bromonitroalkenes are both key starting materials for the preparation of complex structures and possess antimicrobial activity. In this context, we disclose a simple, fully heterogeneous synthetic approach for their preparation in good overall yields.
Synthesis of 3-Bromo-3-nitroacrylates
作者:Z. M. Sarkisyan、K. D. Sadikov、A. S. Smirnov、A. A. Kuzhaeva、S. V. Makarenko、N. A. Anisimov、L. I. Deiko、V. M. Berestovitskaya
DOI:10.1023/b:rujo.0000044559.83690.b4
日期:2004.6
Reaction of alkyl-3-nitro-and-3-bromo-3-nitroacrylates with 2-(2-nitroethenyl)furan
作者:V. M. Berestovitskaya、N. A. Anisimova、O. N. Kataeva、G. A. Berkova、A. Jager
DOI:10.1134/s1070363208050216
日期:2008.5
The diene condensation of beta-nitro and beta-bromo-beta-nitroacrylates with 2-(2-nitroethenyl)furan as 1,3-diene leads to a mixture of regioisomeric tetrahydrobenzofurans transforming under the reaction conditions into benzofurancarboxylates due to the easy dehydrohalogenation, denitration, and dehydration. In the case of a gem-bromonitroacrylate reaction takes two routes: diene synthesis and alkylation of the furan ring, the latter process prevailing. The structure of products formed was established by spectral methods. The investigation of geometry of 2-(1-methoxycarbonyl-2-nitroethenyl)-5-(2-nitroethenyl)furan by XRD analysis showed that its vinyl fragments have the coplanar chelate-like structure with the cisoid orientation of the CO2Me and NO2 groups. The ester group deviates from the plane of the the carbon-carbon multiple bond.
Reaction of 3-nitro-and 3-bromo-3-nitroacrylates with sodium azide
作者:N. A. Anisimova、V. M. Berestovitskaya、G. A. Berkova、N. G. Makarova
DOI:10.1134/s107042800705003x
日期:2007.5
Reactions of 3-nitro-and 3-bromo-3-nitroacrylates with sodium azide proceed as 1,3-dipolar cycloaddition and lead to the formation of triazolyl-and nitrotriazolylcarboxylates, and also of azido-and azidonitropropenoates.
Synthesis and structure of 2-(nitromethylene)-2H-1,4-benzothiazin-3(4H)-one
作者:V. M. Berestovitskaya、V. A. Tafeenko、S. V. Makarenko、K. D. Sadikov、I. V. Chernyshev
DOI:10.1134/s1070363206010269
日期:2006.1
A new representative of benzothiazines, (2Z)-2-(nitromethylene)-2H-1,4-benzothiazin-3(4H)-one, was synthesized, and its structure was studied. According to H-1 NMR, IR, and UV spectral and X-ray diffraction data, the molecules are planar highly conjugated structures that exist in crystal as centrosymmetric dimers; the latter form layers overlapping with each other and held together by strong pi-pi interaction between the carbonyl groups of neighboring layers.