19865-60-2Relevant articles and documents
Nitrone synthesis via pair electrochemical coupling of Nitro-Compounds with Benzyl Alcohol Derivatives
Salehzadeh, Hamid,Mashhadizadeh, Mohammad Hossein
, p. 9307 - 9312 (2019/07/08)
Here we report a paired electrochemical coupling of readily accessible nitro-compounds with benzyl alcohols to yield nitrone derivatives. In this work, electrochemical behavior of nitrobenzene and benzyl alcohol derivatives was studied by cyclic voltammetry and controlled potential coulommetry. Electrochemical reactions have been performed in aqueous/ethanol (or acetonitrile) solutions by employing common graphite electrodes and a simple controlled current protocol which can make this strategy more appealing than other conventional pathways.
PVP-Pd nanoparticles as efficient catalyst for nitroarene reduction under mild conditions in aqueous media
Uberman, Paula M.,García, Carolina S.,Rodríguez, Julieta R.,Martín, Sandra E.
supporting information, p. 739 - 748 (2017/05/19)
The catalytic activity of PVP-Pd nanoparticles synthesized by electrochemical methods was explored in nitroaromatic hydrogenation reaction. In this transformation, the colloidal nanocatalyst proved to have outstanding catalytic activity under sustainable reaction conditions. This mild process efficiently reduced the nitroaromatic group at room temperature, without high pressure of molecular hydrogen and in aqueous medium. Furthermore, several functional groups were tolerated, given the corresponding substituted arylamines in excellent yields and with high TOF. In addition, one-pot reactions and tandem process were explored, in which nitroaromatic hydrogenation reaction was included in the synthesis of modified amines. This methodology was effectively incorporated in tandem reactions and one-pot procedures, achieving N-arylamines functionalized in good isolated yields. Finally, comparison of sustainable chemistry metrics analysis demonstrated that this methodology is a reliable approach to perform the nitro compound hydrogenation process.
Influence of the side-group at C=N bridging bond of bis-aryl Schiff bases on the wavelength of absorption maximum of ultraviolet absorption spectra
Luo, Qingqing,Cao, Chao-Tun,Cao, Zhongzhong,Cao, Chenzhong
, p. 406 - 413 (2016/07/28)
The compounds N-(benzylidene)-anilines XArCH=NArY (XBAY), N-(phenyl-ethylene)-anilines XArC(CH3)=NArY (XPEAY) and N-phenyl-α-phenylnitrones XArCH=N(O)ArY (XPNY) have bridging group CH=N, C(CH3)=N and CH=N(O) respectively, in which the C(CH3)=N has a side-group methyl CH3 at carbon end and the CH=N(O) has a side-group O atom at nitrogen end. In this work, a series of XPEAY and XPNY were synthesized, and their longest wavelength maximum λmax (nm) of ultraviolet absorption spectra were measured. Then the change regularity of the νmax (cm-1, νmax=1/λmax) of XPEAY and XPNY were investigated, and they were compared with that of XBAY (reported by ref.26). The results indicate: (1) There are no good linear relationships between the νmax of XBAYs and XPEAYs or XPNYs. (2) In case of a same set of X-Y group couples, the distribution of λmax of XPEAYs is larger than that of XPNYs. (3) The side-group CH3 makes the effect of σ(X) larger than that of σ(Y) on the νmax of XPEAYs, whereas the O atom makes the effect of σ(Y) larger than that of σ(X) on the νmax of XPNYs. (4) The cross-interaction between X and Y has important effect on the all νmax. However, the cross-interaction between CH3 and X/Y has not important effect on the νmax of XPEAY, and the cross-interaction between O and X/Y has not important effect on the νmax of XPNY. Copyright
