- The effect of intramolecular hydrogen bond on the ultraviolet absorption of bi-aryl Schiff bases
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Two kinds of Schiff bases, 85 samples of N-(benzylidene)-anilines (ZBAY) and 83 samples of N-(phenyl-ethylene)-anilines (ZAPEY), were used as model compounds, in which the ZBAY contains 13 compounds with 2-OH and the ZAPEY contains 35 compounds with 2-OH
- Cao, Chao-Tun,Li, Luyao,Cao, Chenzhong,Liu, Junlan
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- Synthesis and Anti-Fungal Activity of New 3-Aryl-1,3-benzoxazine-2-ketone Derivatives
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Abstract: In the study, a series of new 3-aryl-1,3-benzoxazine-2-ketone derivatives hasbeen designed, synthesized and evaluated for anti-fungal activity against sixspecies of phytopathogenic fungi. Among those, two compounds have exhibited highinhibitory
- Huang, Fen,Jiao, Wenjie,Wan, Yichao
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p. 1112 - 1116
(2021/08/06)
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- Oxazine Ring-Related Vibrational Modes of Benzoxazine Monomers Using Fully Aromatically Substituted, Deuterated, 15N Isotope Exchanged, and Oxazine-Ring-Substituted Compounds and Theoretical Calculations
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Polymerization of benzoxazine resins is indicated by the disappearance of a 960-900 cm-1 band in infrared spectroscopy (IR). Historically, this band was assigned to the C-H out-of-plane bending of the benzene to which the oxazine ring is attach
- Han, Lu,Iguchi, Daniela,Gil, Phwey,Heyl, Tyler R.,Sedwick, Victoria M.,Arza, Carlos R.,Ohashi, Seishi,Lacks, Daniel J.,Ishida, Hatsuo
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p. 6269 - 6282
(2017/09/01)
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- Copper-Catalyzed Cascade Cycloamination of α-Csp3-H Bond of N-Aryl Ketimines with Azides: Access to Quinoxalines
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A copper-catalyzed cycloamination of α-Csp3-H bond of N-aryl ketimines with sodium azide has been developed. This methodology provides an efficient access to quinoxalines and features mild reaction conditions and readily available ketimines with diverse functional group tolerance.
- Chen, Tengfei,Chen, Xun,Wei, Jun,Lin, Dongen,Xie, Ying,Zeng, Wei
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supporting information
p. 2078 - 2081
(2016/06/01)
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- Practical synthesis of N-aryl-o-hydroxyaryl ketimines
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(Chemical Equation Presented) Heating o-hydroxyacetophenones and anilines under solvent-free conditions afforded the corresponding aryl ketimines in good to excellent yields. Copyright Taylor & Francis Group, LLC.
- Nguyen, Thanh Binh,Wang, Qian,Gueritte, Francoise
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experimental part
p. 2648 - 2663
(2012/07/27)
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- Asymmetric reduction of aryl imines using Candida parapsilosis ATCC 7330
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A highly enantioselective one pot, novel biocatalytic method for the asymmetric reduction of aryl imines is reported. Treatment of aryl imines with Candida parapsilosis ATCC 7330 in aqueous medium produces the enantiomerically pure (R)-secondary amines in
- Vaijayanthi,Chadha, Anju
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- The novel reaction of ketones with o-oxazoline-substituted anilines
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A variety of ketones react with o-oxazoline-substituted anilines in the presence of catalytic amount of p-toluenesulfonic acid in dry n-butanol to form 4-amino-substituted quinolines or 4-quinolones in fair to good yields.
- Luo, Fen-Tair,Ravi, Vija K.,Xue, Cuihua
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p. 9365 - 9372
(2007/10/03)
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- A study of the gas-phase interconversion of 1-(2-aryloxyphenyl)-alkaniminyl and 2-(aryliminomethyl)phenoxyl radicals
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Flash vacuum pyrolysis of the allyl ethers 9-11 and of the oxime ethers 15-17 at 650°C (5 × 10-2-5 × 10-3 Torr) generates 2-(aryliminomethyl)phenoxyl radicals 4 and 1-(2-aryloxyphenyl)alkaniminyl radicals 5 respectively which can interconvert via a spirodienyl radical leading to common products which are generally isolated in low to moderate yield. The iminyls 5 normally undergo β-cleavage leading to nitriles (e.g. 21) and/or to benzofurans (e.g. 22) after cyclisation. The phenoxyls 4 show more complex behaviour dominated by hydrogen abstraction processes leading to products such as phenols (e.g. 32), the indole 27 or phenanthridines 34 and 35.
- Black, Michael,Cadogan,Leardini, Rino,McNab, Hamish,McDougald, Graham,Nanni, Daniele,Reed, David,Zompatori, Alberto
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p. 1825 - 1832
(2007/10/03)
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- New Route for the Preparation of 2H-3-Aryl-3,4-dihydro-1,3-benzoxazines and 2H-3-Aryl-3,4-dihydro-4-methyl-1,3-benzoxazines
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2-Hydroxybenzaldehyde (1) and 1-(2-hydroxyphenyl)ethanone (2) on reaction with different primary aromatic amines gave 2-(arylimino)methylphenols (3) and 2-phenols (4), respectively. 3 and 4 on reduction with sodium borohydride gave 2-(arylamino)methylphenols (5) and 2-phenols (6), which underwent cyclisation with formaldehyde to form 2H-3-aryl-3,4-dihydro-1,3-benzoxazines (7) and 2H-3-aryl-3,4-dihydro-4-methyl-1,3-benzoxazines (8), respectively.
- Joglekar, S. J.,Samant, S. D.
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p. 110 - 111
(2007/10/02)
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- Study of Formation Constants of Substituted Salicylanils and 2'-Hydroxysalicylanils
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The proton-ligand stability constants of some substituted salicylanils and 2'-hydroxy-salicylanils have been studied by the Bjerrum-Calvin pH titration technique in water-dioxane medium (1:3 v/v) at μ ca. 0.1 (NaClO4) and at 30 deg C (+/-0.1).The results
- Dodwad, S.S.,Patil, Indira,Datar, M.G.
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p. 595 - 597
(2007/10/02)
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- Study of Photochromism in the Anils of o-Hydroxyacetophenone, o-Hydroxybenzophenone and 2'-Hydroxydeoxybenzoin
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The photochromic activity of anils (VI) of o-hydroxyacetophenone, o-hydroxybenzophenone and 2'-hydroxydeoxybenzoin has been investigated in methylcyclohexane-pet. ether (40 - 60 deg C) at -180 deg C and in liquid paraffin at -75 deg C.No photocoloured species has been observed in any of these anils after irradiation with 365 nm wavelength in rigid glassy solutions.This is most likely due to the increased height of potential energy barrier which in turn is caused by the increased basicity of the imine nitrogen because of positive inductive effect of methyl, benzyl and phenyl groups substituted in place of aldehydic proton.
- Mal, S.,Norula, J. L.,Rawat, M. S. M.
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p. 120 - 123
(2007/10/02)
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- Boron Complexes of Monofunctional Bidentate and Bifunctional Tridentate Shiff Bases
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Boron Schiff base complexes of the type (AcO)2B(SB) and (AcO)2B(SBH) have been synt
- Singh, H. B.,Tandon, J. P.
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p. 836 - 839
(2007/10/02)
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- Syntheses d'aminoalcools-1,3 ou d'aminophenols-1,3 par reduction d'enaminones ou d'iminophenols par les hydrures metalliques. Etude structurale par infrarouge et RMN des aminoalcools-1,3 bisecondaires diastereomeres
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Enaminones, obtained by reaction of a primary amine with a β-diketone, can take three tautomeric forms: keto-enamine Ia, keto-imine Ib and imino-enol Ic.In general the keto-enamine form Ia is the most stable.Thi
- Maroni, Pierre,Cazaux, Louis,Tisnes, Pierre,Zambeti,Marianthie
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p. 179 - 186
(2007/10/02)
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