Synthesis of Phosphorylated Nitrocyclohexenes and Nitronorbornenes

Russian Journal of General Chemistry -     

β-Acetyl-β-nitrostyrenes: Structure and use for synthesis of heteryl-containing structures

¹H, IR, and electronic absorption spectroscopy and X-ray diffraction analysis were used to establish that 1-acetyl-1-nitro-2-phenyl-and 2-(p-methoxyphenyl)ethenes have Z configuration, and their 2-(p-N,Ndimethylaminophenyl)-substituted analog exists in chloroform-d ³ as a mixture of Z and E isomers. The reactions of gem-acetylnitroethenes with N-methylpyrrole were shown to involve alkylation at the C²-reaction center of the heterocycle. The reactions of these nitroalkenes with hydrazine form pyrazoles and azines, with acetylhydrazine, the corresponding hydrazones (via transalkenylation), and with sodium azide, acetylsubstituted 1,2,3-triazoles.     

Reactions of 2-Arylthio- and 2-Arylsulfonyl-1-nitro-1-phenylethenes with Amines

2-Arylthio- and 2-arylsulfonyl-1-nitro-1-phenylethenes react with amines to give the corresponding nitroenamines whose configuration (E or Z) depends on the amine structure. Primary amines gives rise to Z-nitroenamines, secondary cyclic amines with 2-arylthio-1-nitroalkenes form E-nitroenamines, and with more reactive 2-arylsulfonyl-1-nitroalkenes E/Z-isomeric mixtures are obtained.     

Synthesis and Structural Features of 1-Acyl-1-nitro-2-furyl(thienyl)ethenes

A one-stage synthesis of 1-acyl-1-nitro-2-furyl(thienyl)ethenes was developed and structural assessment of the products was performed by means of ¹H, IR, and UV spectroscopy and dipole moment measurements. The acetyl derivatives have Z configuration, and the benzoyl derivatives, E configuration. The UV and IR spectra, as well as the rather high dipole moments ( 5-6 D) point to an essential contribution in the structures of dipolar forms.     

Temperature effect of the muon component and practical questions for considering it in real time

A method for real-time practical consideration of the temperature effect on the cosmic ray muon component using muon telescopes of different geometries is developed. The method is applied to the real-time data of muon detectors. It is shown that the accuracy attainable in such an approach is sufficient for studying all classes of variations.