The schiff base of gossypol with 3,6,9,12,15,18,21,24-octaoxa-pentacosylamine complexes and monovalent cations studied by electrospray ionization-mass spectrometry,1H nuclear magnetic resonance, Fourier transform infrared, as well as PM5 semiempirical methods

Biopolymers ◽  
2004 ◽  
Vol 74 (4) ◽  
pp. 273-286 ◽  
Author(s):  
Piotr Przybylski ◽  
Bogumil Brzezinski ◽  
Franz Bartl
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Magnetic Resonance ◽  
Electrospray Ionization ◽  
Semiempirical Methods ◽  
Ionization Mass ◽  
Monovalent Cations ◽  
1H Nuclear Magnetic Resonance

Synthesis and antifungal activity of camphoric acid-based acylhydrazone compounds

Holzforschung ◽  
2014 ◽  
Vol 68 (8) ◽  
pp. 889-895 ◽  
Author(s):  
Xian-Li Ma ◽  
Fang-Yao Li ◽  
Wen-Gui Duan ◽  
Jing-Ni Liao ◽  
Zhi-duo Lin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Antifungal Activity ◽  
Magnetic Resonance ◽  
Electrospray Ionization ◽  
Condensation Reaction ◽  
Ionization Mass ◽  
Camphoric Acid ◽  
C Nmr

Abstract In the search of novel potent bioactive compounds, 18 novel camphoric acid-based acylhydrazone compounds 4a–4r were designed and synthesized by the condensation reaction of N-amino camphorimide (3) with substituted benzaldehyde based on camphoric acid as the starting material. The target compounds were characterized by means of Fourier transform infrared (FTIR), 1H nuclear magnetic resonance (NMR), 13C NMR, electrospray ionization-mass spectrometry (ESI-MS), and elemental analysis. The preliminary bioassay showed that the following camphoric acid-based compounds exhibited excellent antifungal activity with an inhibition ratio of 95% against Physalospora piricola at the concentration of 50 μg ml-1: o-bromophenyl acylhydrazone (4f), p-bromophenyl acylhydrazone (4g), p-methoxyphenyl acylhydrazone (4m), and p-hydroxyphenyl acylhydrazone (4p).

scholarly journals New Constituents From the Roots and Stems of Paramignya trimera

2019 ◽  
Vol 14 (6) ◽  
pp. 1934578X1986101 ◽  
Author(s):  
Tran Thu Huong ◽  
Vu Thi Ha ◽  
To Dao Cuong ◽  
Ninh The Son ◽  
Tran Quoc Toan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Spectral Analysis ◽  
Magnetic Resonance ◽  
Medicinal Plant ◽  
Electrospray Ionization ◽  
Liver Diseases ◽  
Methanol Extract ◽  
Ionization Mass ◽  
New Compounds

Paramignya trimera (Oliv.) Guill. (Rutaceae), mostly distributed in the southern regions of Vietnam, has been used as a medicinal plant for treatment of liver diseases and cancer. From the methanol extract of the roots and stems of P. trimera, 3 new compounds (1-3) were isolated, including ninhvanin B (1), paramitrimerol (2), and parabacunoic acid (3), and a known alkaloid, citrusinine-I (4). The structures of these compounds were elucidated by electrospray ionization mass spectrometry and nuclear magnetic resonance spectral analysis, as well as by comparison with literature data.

scholarly journals One New Terphenyl Glycoside From a Sponge-Derived Fungus Trichoderma reesei (HN-2016-018)

2020 ◽  
Vol 15 (2) ◽  
pp. 1934578X2090775
Author(s):  
Saif Ur Rehman ◽  
Jing-Shuai Wu ◽  
Lu-Jia Yang ◽  
Shi Ting ◽  
Chang-Lun Shao ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Electrospray Ionization ◽  
Trichoderma Reesei ◽  
Electrospray Ionization Mass Spectrometry ◽  
Inhibitory Activity ◽  
Spectroscopic Analysis ◽  
Ionization Mass

One new terphenyl glycoside (1), gliocladinin D, together with 4 known compounds (2-5) were isolated from the sponge-derived fungus Trichoderma reesei (HN-2016-018). The structure of the new compound was elucidated by the comprehensive spectroscopic analysis, including 1-dimensional and 2-dimensional nuclear magnetic resonance, and high-resolution electrospray ionization mass spectrometry. Compound 3 exhibited moderate Topo I inhibitory activity.

Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

2015 ◽  
Vol 12 (2) ◽  
pp. 13
Author(s):  
Muhamad Faridz Osman ◽  
Karimah Kassim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Ftir Spectroscopy ◽  
Coordination Complexes ◽  
Frequency Range ◽  
Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively. 

Sign in / Sign up

Export Citation Format

Share Document