Synthesis of 2-(polyfluoromethyl)pyrimido-[1,2-a]benzimidazole-4-carbaldehyde derivatives

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Entanglement fidelity of coherent-state teleportation with asymmetric quantum channel

A strategy for teleporting coherent states with the entanglement fidelity is considered in the general case of an asymmetric teleportation scheme. It is shown that the nonbalanced homodyne detection with the subsequent coherent displacement is required to provide the average teleportation fidelity of entanglement.     

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.     

Interaction of the trimethylsilyl cation with molecules of aliphatic nitro compounds in the gas phase

Interaction of mononitroalkanes with the trimethylsilyl cation in the gas phase under chemical ionization (CI) conditions results in the formation of [M+SiMe₃]⁺ ions, which are more stable than the corresponding protonated molecular ions. In the case of 2-nitro-2-methylpropane and 2-nitropentane, fragmentation of the [M+SiMe₃]⁺ ions occurs with the formation of C₄H₉ ⁺ and C₅H₁₁ ⁺ carbocations, respectively. In the case of 1,1-dinitroethane and 1-halo-1,1-dinitroethane, fragmentation of the [M+SiMe₃]⁺ ions occurs with splitting off of a NO₂ ^. radical or an XNO₂ molecule (X=H, F, or Cl). Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1232–1234, June, 1997.     

Halogenation of Fluorinated 1,3,5‐Triketones

The behavior of linear and cyclic fluorinated 1,3,5‐triketones and their metal derivatives towards common halogenating agents was examined, and optimal reaction conditions for the straightforward synthesis of mono‐, di‐, and tetrahalogenated products were found (Schemes 1–3). An aromatization through a double HBr elimination from an α,α′‐dibrominated cyclohexanone was shown to be a promising synthetic route to 1,1′‐(2‐hydroxy‐1,3‐phenylene)bis[2,2,2‐trifluoroethanones] (= 2,6‐bis(trifluoroacetyl)phenols; Scheme 4). Additionally, the 1,3,5‐triketones prepared add readily H₂O or alcohols to produce novel bridged 2,6‐dihydroxypyran‐4‐ones (Scheme 2). The structure of the obtained compounds 6a and 7a was confirmed by X‐ray structure analysis.