Monomers, chains, ladders, and two-dimensional sheets: Structural diversity in six new compounds of Zn(II) with 4,4′-bipyridine

Polyhedron ◽  
2006 ◽  
Vol 25 (13) ◽  
pp. 2605-2615 ◽  
Author(s):  
Jonathan D. Woodward ◽  
Rénal V. Backov ◽  
Khalil A. Abboud ◽  
Daniel R. Talham
Keyword(s):  
Structural Diversity ◽  
Two Dimensional ◽  
New Compounds

scholarly journals Recent Findings in Azaphilone Pigments

2021 ◽  
Vol 7 (7) ◽  
pp. 541
Author(s):  
Lúcia P. S. Pimenta ◽  
Dhionne C. Gomes ◽  
Patrícia G. Cardoso ◽  
Jacqueline A. Takahashi
Keyword(s):  
Water Solubility ◽  
Biological Activities ◽  
Low Cost ◽  
Scale Up ◽  
Structural Diversity ◽  
Downstream Processing ◽  
Global Market ◽  
Yield Improvement ◽  
Potential Applications ◽  
New Compounds

Filamentous fungi are known to biosynthesize an extraordinary range of azaphilones pigments with structural diversity and advantages over vegetal-derived colored natural products such agile and simple cultivation in the lab, acceptance of low-cost substrates, speed yield improvement, and ease of downstream processing. Modern genetic engineering allows industrial production, providing pigments with higher thermostability, water-solubility, and promising bioactivities combined with ecological functions. This review, covering the literature from 2020 onwards, focuses on the state-of-the-art of azaphilone dyes, the global market scenario, new compounds isolated in the period with respective biological activities, and biosynthetic pathways. Furthermore, we discussed the innovations of azaphilone cultivation and extraction techniques, as well as in yield improvement and scale-up. Potential applications in the food, cosmetic, pharmaceutical, and textile industries were also explored.

Four New Compounds from the Australian Brown Alga Cystophora brownii

1998 ◽  
Vol 51 (12) ◽  
pp. 1157 ◽  
Author(s):  
Baohong Bian ◽  
Ian A. van Altena
Keyword(s):  
Brown Alga ◽  
Two Dimensional ◽  
Chemical Methods ◽  
New Compounds

Two new steroids, (20S)-3β,20-dihydroxyergosta-5,24(28)-dien-16-one (7) and 3β-hydroxyergosta-5,24(28)-dien-16-one (9), and two new diastereoisomeric meroditerpenes, compounds (10) and (11), † have been isolated from the brown alga Cystophora brownii (Cystoseiraceae). Their structures were elucidated by one- and two-dimensional n.m.r. and other spectrometric and chemical methods.

Regioselective synthesis of new 7,8-dichlorobenzofuro[3,2-c]quinoline-6,9,10(5H)-triones from reactions of 4-hydroxy-2-quinolones with 3,4,5,6-tetrachloro-1,2-benzoquinone

2020 ◽  
Vol 44 (7-8) ◽  
pp. 388-392
Author(s):  
Ashraf A Aly ◽  
Alaa A Hassan ◽  
Nasr K Mohamed ◽  
Lamiaa E Abd El-Haleem ◽  
Stefan Bräse
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Elemental Analysis ◽  
Mass Spectra ◽  
Regioselective Synthesis ◽  
Two Dimensional ◽  
New Compounds ◽  
Nuclear Magnetic

A novel series of 7,8-dichlorobenzofuro[3,2- c]quinoline-6,9,10(5 H)-triones was obtained regioselectively in good yields. The products were formed by the reactions of the 4-hydroxy-2(1 H)-quinolinones with 3,4,5,6-tetrachloro-1,2-benzoquinone in tetrahydrofuran as the solvent. Infrared, nuclear magnetic resonance (two-dimensional nuclear magnetic resonance), mass spectra and elemental analysis were used to elucidate the structures of new compounds.

scholarly journals Structural diversity induced by ligand geometry: From two-dimensional to three-dimensional coordination polymers with pyridine

2020 ◽  
pp. 174751982096816
Author(s):  
Fang-Kuo Wang ◽  
Shi-Yao Yang ◽  
Hua-Ze Dong
Keyword(s):  
Coordination Polymers ◽  
Three Dimensional ◽  
Structural Diversity ◽  
Dimensional Structure ◽  
Layer By Layer ◽  
Two Dimensional ◽  
Guest Molecules ◽  
X Ray ◽  
Benzenedicarboxylic Acid ◽  
Benzenetricarboxylic Acid

Two coordination polymers with two-dimensional and three-dimensional structures are, {[Zn3(bdc)3(py)2]·2NMP}n (1) (H2bdc = 1,4-benzenedicarboxylic acid) and [Zn2(NO3−)(btc)(nmp)2(py)]n (2) (H3btc = 1,3,5-benzenetricarboxylic acid), synthesized by hot-solution reactions of Zn(NO3)2·6H2O, pyridine (py) and two different ligands in N-methylpyrrolidone (NMP). {[Zn3(bdc)3(py)2]·2NMP}n exhibits two-dimensional networks with trizinc subunits [Zn3(COO)6py2] stacking with a layer-by-layer alignment, and there are strong π–π interactions involving py from adjacent layers. [Zn2(NO3−)(btc)(nmp)2(py)]n has a three-dimensional structure containing two independent zinc ions, tetrahedral ZnO4 and octahedral ZnNO5. Based on X-ray studies, the coordination polymers {[Zn3(bdc)3(py)2]·2NMP}n (1) have a porous structure with NMP guest molecules. In contrast, X-ray studies revealed that coordination polymer [Zn2(NO3−)(btc)(nmp)2(py)]n (2) had a larger void that was inhabited by coordinated py and NMP. In addition, the form of the two coordination polymers changed from two-dimensional to three-dimensional with transformation of the ligand geometry.

Physical Properties of New Compounds RMg2Ni9(R=La, Ce, Pr, Nd and Gd) with a Two Dimensional Rare Earth Arrangement

1998 ◽  
Vol 67 (7) ◽  
pp. 2201-2204 ◽  
Author(s):  
Hidetaka Fukuda ◽  
Karim Kadir ◽  
Yasuyoshi Matsumoto ◽  
Takashi Suzuki ◽  
Hironobu Fujii ◽  
...  
Keyword(s):  
Rare Earth ◽  
Physical Properties ◽  
Two Dimensional ◽  
New Compounds

Structural Diversity Observed in Two-dimensional Square Lattice Metal–Organic Frameworks Assembled from Zn(II) and 3-(4-Pyridyl)benzoate

2017 ◽  
Vol 17 (12) ◽  
pp. 6445-6454 ◽  
Author(s):  
Gift Mehlana ◽  
Chad Wilkinson ◽  
Christelle N. Dzesse T. ◽  
Gaëlle Ramon ◽  
Susan A. Bourne
Keyword(s):  
Metal Organic Frameworks ◽  
Structural Diversity ◽  
Square Lattice ◽  
Two Dimensional ◽  
Metal Organic

scholarly journals Novel Ecdysteroids fromSerratula wolffii

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Attila Ványolós ◽  
Zoltán Béni ◽  
Miklós Dékány ◽  
András Simon ◽  
Mária Báthori
Keyword(s):  
Methanolic Extract ◽  
Spectroscopic Techniques ◽  
Two Dimensional ◽  
Nmr Methods ◽  
New Compounds ◽  
Ponasterone A

Two new and one known ecdysteroids were identified in the methanolic extract of the roots ofSerratula wolffii. The new compounds isolated were ponasterone A-22-apioside (1) and 3-epi-shidasterone (3), together with the known 3-epi-22-deoxy-20-hydroxyecdysone (2). The structures of compounds1–3were determined by extensive spectroscopic techniques, including one- and two-dimensional NMR methods.

Unusual Two-Dimensional Nickel(II) Complexes Based on [Ni(dien)]2+ and [M(CN)4]2− Building Blocks (M = Ni, Pd and Pt)− Synthesis, Structural Diversity and Magnetic Properties

2004 ◽  
Vol 2004 (9) ◽  
pp. 1886-1893 ◽  
Author(s):  
Iñaki Muga ◽  
Juan M. Gutiérrez-Zorrilla ◽  
Pablo Vitoria ◽  
Pascual Román ◽  
Luis Lezama ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Structural Diversity ◽  
Building Blocks ◽  
Two Dimensional

scholarly journals Dibromopyrrole Alkaloids from the Marine Sponge Acanthostylotella sp

2009 ◽  
Vol 4 (1) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Sherif Saeed Ebada ◽  
RuAngelie Edrada-Ebel ◽  
Nicole J. de Voogd ◽  
Victor Wray ◽  
Peter Proksch
Keyword(s):  
Natural Products ◽  
Carboxylic Acid ◽  
Methyl Ester ◽  
Marine Sponge ◽  
Two Dimensional ◽  
New Compounds

Fourteen dibromopyrrole alkaloids were isolated from the marine sponge Acanthostylotella sp. collected in Indonesia. In addition to the known compounds 4,5-dibromo-N-(methoxy-methyl)-1 H-pyrrole-2-carboxamide (7), 4,5-dibromo-1 H-pyrrole-2-carboxamide (8), mukanadin D (9), (±)-longamide B methyl ester (10), (±)-longamide B (11), (±)-longamide (12), 3,4-dibromo-1 H-pyrrole-2-carboxamide (13), 2-cyano-4,5-dibromo-1 H-pyrrole (14), six compounds were isolated that proved to be new natural products including acanthamides A – D (1 – 4), methyl 3,4-dibromo-1 H-pyrrole-2-carboxylate (5) and 3,5-dibromo-1 H-pyrrole-2-carboxylic acid (6). The structures of the new compounds were unequivocally identified based on one and two dimensional NMR and on HRFTMS as well as by comparison with the literature.

Sign in / Sign up

Export Citation Format

Share Document