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1980 1
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23 results

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Page 1
Potential Building Blocks for 1,4-Dihydro-N-heteroacenes.
John Plater M, Harrison WTA. John Plater M, et al. ChemistryOpen. 2022 Jun;11(6):e202200092. doi: 10.1002/open.202200092. ChemistryOpen. 2022. PMID: 35674450 Free PMC article.
The fluorine atoms are displaced first, followed by an activated nitro group. Two intermediates have been characterised by X-ray single-crystal structure determinations. ...The high reactivity of the phenazine, which is prone to oxidise and rearrange, as are displacement p …
The fluorine atoms are displaced first, followed by an activated nitro group. Two intermediates have been characterised by X-ray sing …
New type of dual solid-state thermochromism: modulation of intramolecular charge transfer by intermolecular pi-pi interactions, kinetic trapping of the aci-nitro group, and reversible molecular locking.
Naumov P, Lee SC, Ishizawa N, Jeong YG, Chung IH, Fukuzumi S. Naumov P, et al. J Phys Chem A. 2009 Oct 22;113(42):11354-66. doi: 10.1021/jp902517x. J Phys Chem A. 2009. PMID: 19780605
It was found that the polymorphism is due to the possibility of "locking" and "unlocking" of the alkyl arms by formation of a strong intramolecular hydrogen bond between the hydroxyl groups at their hydroxyl termini. The locking of BDB2, with shortest alkyl arms, is revers …
It was found that the polymorphism is due to the possibility of "locking" and "unlocking" of the alkyl arms by formation of a strong intramo …
Davis-Beirut Reaction: Diverse Chemistries of Highly Reactive Nitroso Intermediates in Heterocycle Synthesis.
Zhu JS, Haddadin MJ, Kurth MJ. Zhu JS, et al. Acc Chem Res. 2019 Aug 20;52(8):2256-2265. doi: 10.1021/acs.accounts.9b00220. Epub 2019 Jul 22. Acc Chem Res. 2019. PMID: 31328502 Free PMC article. Review.
Alternatively, we have also developed methods involving mild photochemical conditions for the nitrobenzyl aci-nitro nitroso imine sequence. Solvent consideration is especially important for modulating the chemistry of the reactive intermediates in these reactions; t …
Alternatively, we have also developed methods involving mild photochemical conditions for the nitrobenzyl aci-nitro nitroso im …
Conserved Vibrational Coherence in the Ultrafast Rearrangement of 2-Nitrotoluene Radical Cation.
Ampadu Boateng D, Word MD, Gutsev LG, Jena P, Tibbetts KM. Ampadu Boateng D, et al. J Phys Chem A. 2019 Feb 14;123(6):1140-1152. doi: 10.1021/acs.jpca.8b11723. Epub 2019 Feb 5. J Phys Chem A. 2019. PMID: 30668102
Strong-field adiabatic ionization is used to prepare 2-NT(+), which can overcome a modest 0.76 eV energy barrier to H atom attack to form the aci-nitro tautomer as soon as 20-60 fs after ionization. Once formed, the aci-nitro tautomer spontaneously los …
Strong-field adiabatic ionization is used to prepare 2-NT(+), which can overcome a modest 0.76 eV energy barrier to H atom attack to form th …
Catalytic Enantioselective Alkylation of Indoles with trans-4-Methylthio-β-Nitrostyrene.
Méndez I, Ferrer C, Rodríguez R, Lahoz FJ, García-Orduña P, Carmona D. Méndez I, et al. ACS Omega. 2020 Oct 21;5(43):27978-27989. doi: 10.1021/acsomega.0c03485. eCollection 2020 Nov 3. ACS Omega. 2020. PMID: 33163781 Free PMC article.
The reaction of the rhodium aqua-complex (S (Rh),R (C))-[Cp*Rh{(R)-Prophos} (OH(2))][SbF(6)](2) [Cp* = C(5)Me(5), Prophos = propane-1,2-diyl-bis(diphenylphosphane)] (1) with trans-4-methylthio-beta-nitrostyrene (MTNS) gives two linkage isomers (S (Rh),R (C))-[Cp*Rh{(R)-Prophos}(k …
The reaction of the rhodium aqua-complex (S (Rh),R (C))-[Cp*Rh{(R)-Prophos} (OH(2))][SbF(6)](2) [Cp* = C(5)Me(5), Prophos = propane-1,2-diyl …
Formation of 4H-1,2-benzoxazines by intramolecular cyclization of nitroalkanes. Scope of aromatic oxygen-functionalization reaction involving a nitro oxygen atom and mechanistic insights.
Nakamura S, Sugimoto H, Ohwada T. Nakamura S, et al. J Am Chem Soc. 2007 Feb 14;129(6):1724-32. doi: 10.1021/ja067682w. Epub 2007 Jan 24. J Am Chem Soc. 2007. PMID: 17249674
The reaction rate is strongly influenced by the acidity of the reaction medium, and the methyl ester group on the alpha-carbon atom with respect to the nitro group facilitates deprotonation at the alpha-position to give aci-nitro species in situ. ...Al …
The reaction rate is strongly influenced by the acidity of the reaction medium, and the methyl ester group on the alpha-carbon atom w …
Photoprocesses of molecules with 2-nitrobenzyl protecting groups and caged organic acids.
Bley F, Schaper K, Görner H. Bley F, et al. Photochem Photobiol. 2008 Jan-Feb;84(1):162-71. doi: 10.1111/j.1751-1097.2007.00215.x. Photochem Photobiol. 2008. PMID: 18173716
A triplet state appears as major transient, when 2-nitrobenzyl derivatives 1 are substituted by 4,5-dimethoxy (2) and 4,5-methylenedioxy (3/4) groups. This triplet of charge transfer character is, however, not part of the route via the aci-nitro into the 2-ni …
A triplet state appears as major transient, when 2-nitrobenzyl derivatives 1 are substituted by 4,5-dimethoxy (2) and 4,5-methylenedioxy (3/ …
Ultrafast Dynamics of o-Nitrophenol: An Experimental and Theoretical Study.
Ernst HA, Wolf TJ, Schalk O, González-García N, Boguslavskiy AE, Stolow A, Olzmann M, Unterreiner AN. Ernst HA, et al. J Phys Chem A. 2015 Sep 3;119(35):9225-35. doi: 10.1021/acs.jpca.5b04900. Epub 2015 Aug 22. J Phys Chem A. 2015. PMID: 26266823
To characterize the largely unknown photolysis mechanism, the dynamics of the lowest lying excited singlet state (S1) of o-NP was investigated by means of femtosecond transient absorption spectroscopy in solution, time-resolved photoelectron spectroscopy (TRPES) in the gas phase …
To characterize the largely unknown photolysis mechanism, the dynamics of the lowest lying excited singlet state (S1) of o-NP was investigat …
Peptide release upon photoconversion of 2-nitrobenzyl compounds into nitroso derivatives.
Nakayama K, Heise I, Görner H, Gärtner W. Nakayama K, et al. Photochem Photobiol. 2011 Sep-Oct;87(5):1031-5. doi: 10.1111/j.1751-1097.2011.00957.x. Epub 2011 Aug 8. Photochem Photobiol. 2011. PMID: 21699543
The photoinduced conversion via the aci-nitro into the nitroso form was studied for 4,5-dimethoxy-2-nitrobenzyl alcohols attached to various leaving groups: amino acids histidine (NHis) and aspartate (NAsp) as well as their fluorenylmethoxycarbonyl derivative …
The photoinduced conversion via the aci-nitro into the nitroso form was studied for 4,5-dimethoxy-2-nitrobenzyl alcohols attac …
Intramolecular nitro-assisted proton transfer in photoirradiated 2-(2',4'-dinitrobenzyl)pyridine: polarized optical spectroscopic study and electronic structure calculations.
Naumov P, Sakurai K, Ishikawa T, Takahashi J, Koshihara SY, Ohashi Y. Naumov P, et al. J Phys Chem A. 2005 Aug 18;109(32):7264-75. doi: 10.1021/jp0520392. J Phys Chem A. 2005. PMID: 16834092
The transition dipole moments of a DNBP single-crystal identified oriented molecules of the long-lived enamine tautomer (NH), rather than of the aci-nitro tautomer (OH), as carriers of the photoinduced blue coloration. ...Once created, regardless of whether via grou …
The transition dipole moments of a DNBP single-crystal identified oriented molecules of the long-lived enamine tautomer (NH), rather than of …
23 results