2102-12-7Relevant academic research and scientific papers
INHIBITORS OF INFLUENZA VIRUSES REPLICATION
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Paragraph 0363; 0364, (2015/06/03)
Polymorphic forms of Compound (1) or a pharmaceutically acceptable salt thereof, wherein Compound (1) is represented by the following structural formula: are Form A of HCl salt of Compound (1)·1/2Η20, Form F of HCl salt of Compound (1)·3Η2
Hydrogen splittings of bis-bicyclic hydrazine radical cations
Nelsen, Stephen F.,Petillo, Peter A.,De Felipps, James,Wang, Yichen,Chen, Ling-Jen,Yonta, Maria J. R.,Neugebauer, Franz A.
, p. 5608 - 5615 (2007/10/02)
1H-NMR spectra of bis-bicyclic hydrazine radical allowed of the proton splitting constants under ~2 G, and assignments to position using deuterium labeling were made for several cases. ENDOR spectra measured the hydrogen spllittings over 2 G. Bridgehead hydrogen splittings constants for sesquibicyclic compounds (bis-N,N'-bicyclics) were observed in the range-0.10 to + 0.14 for six examples containing 2,3-diazabicyclo[2.2.2]octyl rings, -0.14 to -0.04 for two 2,3-diazabicyclo[2.2.2]octenyl compounds, +0.02 to +0.21 for four compounds containing 5,6-diazabicyclo[3.2.2]nonyl and nonenyl rings, and +0.35 to +0.84 for containing 2,3-diazabicyclo[2.2.1]heptyl rings, There is not a simple correlation of these bridgehead splitting contants with the lone pair N, C-Hb dihedral angle. For the nine sesquibicyclic hydrazine radical caions studied, the exo splittings in dimethylene bridges were positive, and the endo splittings were nagative in sign. Examination of the W and non-W exp γhydrogen splittings in systems containing bicyclo[2.2.2]octyl rings allowed estimation of the energy difference between double nitrogen inversion conformations.
Fluorescence Quenching and Photoreactions of 2,3-Diazabicyclooct-2-enes. A Case of Charge Transfer and Hydrogen Atom Transfer
Engel, Paul S.,Kitamura, Akihide,Keys, Dalen E.
, p. 5015 - 5021 (2007/10/02)
A variety of organic compounds have been found to quench the long-lived fluorescence of 2,3-diazabicyclooct-2-ene (DBO), but photochemical reactions take place only with good hydrogen atom donors and tetrahalomethanes.A hydrogen isotope effect on kq of 1.7-3.0 was observed with 1,3- and 1,4-cyclohexadiene.While both quenchers photoreduced DBO, the 1,3-isomer also dimerized to a mixture characteristic of triplet diene.The results are rationalized in terms of the usual encounter complex and ion pair except that the former can undergo hydrogen transfer or react with 1,3-cyclohexadiene.A second case of photochemically induced electron transfer fragmentation was found in the reaction of 1-phenyl-DBO with bromotrichloromethane.
Reactions of Iron Atoms with Benzene and Cyclohexadienes in Argon Matrices: Iron-Benzene Complexes and Photolytic Dehydrogenation of Cyclohexadiene
Ball, David W.,Kafafi, Zakya H.,Hauge, Robert H.,Margrave, John L.
, p. 6621 - 6626 (2007/10/02)
Three cyclic C6 hydrocarbons - benzene (C6H6), 1,4-cyclohexadiene, and 1,3-cyclohexadiene (both C6H8) - were codeposited with iron atoms in argon matrices at 12-14 K.When iron atoms were cocondensed with benzene, infrared spectra showed the for
Detailed Mechanism of Thermal Hydrogen Migration in Cyclohexadieneiron Tricarbonyl
Karel, Karin J.,Brookhart, M.,Aumann, R.
, p. 2695 - 2698 (2007/10/02)
The thermal isomerization of (cyclohexadiene-5-exo-h-d7)iron tricarbonyl (8) was examined to obtain detailed information about the general mechanism of 1,5-hydrogen shifts in simple cyclic polyolefin iron tricarbonyl complexes.The isotopically labeled sys
