Results 101 to 110 of about 12,440 (225)

Synthesis and antioxidant activity of new xanthone-type compounds [PDF]

, 2012
3rd Portuguese Meeting on Medicinal Chemistry and 1st Portuguese-Spanish-Brazilian Meeting on Medicinal Chemistry, Aveiro, 28-30 Novembro 2012.Owing to our continuing interest in the synthesis of novel oxygen heterocycles we have recently developed a ...
Cavaleiro, José A. S., Leal, Stephanie B., Pinto, Diana C. G. A., Seca, Ana M. L., Silva, Artur M. S.   +4 more
core  

3,11-Dibromo-14-(4-chlorophenyl)-14H-dibenzo[a,j]xanthene dimethylformamide monosolvate

Acta Crystallographica Section E, 2012
In the title compound, C27H15Br2ClO·C3H7NO, the xanthene moiety has a flattened boat conformation with a folding angle between the naphthalene units of 9.46 (3)°.
Yong Bin Song, Bo Liu
doaj   +1 more source

Biological decolorization of xanthene dyes by anaerobic granular biomass [PDF]

, 2012
Biodegradation of a xanthene dyes was investigated for the first time using anaerobic granular sludge. On a first screening, biomass was able to decolorize, at different extents, six azo dye solutions: acid orange 7, direct black 19, direct blue 71 ...
A Aretxaga, AB Santos Dos, AB Santos Dos, AO Adebiyi, CI Pearce, D Cailean, DK Bakshi, FA Caliman, FE Mosey, FJ Cervantes, FJ Cervantes, FP Zee Van der, FP Zee Van der, FP Zee Van der, FP Zee Van der, FP Zee Van der, G Crini, G Mezohegyi, GJ Jesus, H Momenzadeh, J Guo, J Lan, JC Costa, JH Potgieter, K Itoh, L Pereira, L Pereira, Laura Carmen Apostol, LC Apostol, Luciana Pereira, M Gavrilescu, M Gavrilescu, M Karatas, Maria Gavrilescu, Maria Madalena Alves, P SenthilKumar, PIM Firmino, Raquel Pereira, RG Saratale, S Artvinli, S Kalyuzhnyi, S Khammuang, S Sohrabnezhad, SA Ong, SN Krilov, SR Venkata Mohan   +45 more
core   +1 more source

Nano-Fe3O4 encapsulated-silica particles bearing sulfonic acid groups as an efficient, eco-friendly and magnetically recoverable catalyst for synthesis of various xanthene derivatives under solvent-free conditions

Journal of Saudi Chemical Society, 2017
This report describes an efficient method for the synthesis of 1,8-dioxo-octahydroxanthene, 14H-dibenzo[a,j]xanthene, 12-aryl-tetrahydrobenzo[a]xanthenes-11-one and 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraone derivatives in the presence of a ...
Firouzeh Nemati, Samane Sabaqian
doaj   +1 more source

(E)-2,4-Diamino-5-{7-[(4-chlorophenyl)diazenyl]-3,3-dimethyl-1-oxo-2,3,4,9-tetrahydro-1H-xanthen-9-yl}-6-oxo-1,6-dihydropyridine-3-carbonitrile dimethylformamide monosolvate

IUCrData
In the title compound, C27H23ClN6O3·C3H7NO, much of the molecule is approximately planar, excluding the pyridinic ring, which is almost perpendicular to this plane, and the sp3 atoms of the modified xanthene system. The diazene group is E-configured.
Galal H. Elgemeie, Nadia H. Metwally, El-shimaa S. M. Abd Al-latif, Peter G. Jones   +3 more
doaj   +1 more source

2-[(E)-2-(Benzylideneamino)ethyl]-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one

Acta Crystallographica Section E, 2011
In the title compound, C37H40N4O2, the xanthene and spirolactam rings are almost planar, with r.m.s. deviations from the mean planes of 0.223 (2) and 0.057 (2) Å, respectively, and form a dihedral angle of 85.76&
Zhen Wei, Xujun Zheng, Junjun Bai, Xiaohong Zhai, Lili Song   +4 more
doaj   +1 more source

Chiroptical molecular switches:synthesis and applications [PDF]

, 2006
The last decades of the twentieth century can be characterized as a period in which the use of computers for information storage has integrated in all parts of society. The continuously increasing amount of data to be stored and manipulated has urged the
de Lange, Ben
core   +3 more sources

7-Bromo-9-(2-hydroxy-4,4-dimethyl-6-oxocyclohex-1-en-1-yl)-3,3-dimethyl-2,3,4,9-tetrahydro-1H-xanthen-1-one

Acta Crystallographica Section E, 2012
In the xanthene ring system of the title compound, C23H25BrO4, the 4H-pyran ring is almost planar [maximum deviation = 0.040 (3) Å] and the cyclohexene ring adopts a sofa conformation.
Shaaban K. Mohamed, Mehmet Akkurt, Antar A. Abdelhamid, Phillip E. Fanwick, Herman Potgeiter   +4 more
doaj   +1 more source

9-(2,4-Dichlorophenyl)-3,3,6,6-tetramethyl-3,4,5,6-tetrahydro-9H-xanthene-1,8(2H,7H)-dione

Acta Crystallographica Section E, 2010
The title compound, C23H24Cl2O3, was synthesized by reaction of 2,4-dichlorobenzaldehyde and 5,5-dimethylcyclohexane-1,3-dione in ethylene glycol. The central ring of the xanthene moiety is almost planar (with an r.m.s. deviation of 0.0268 &
Hao Shi
doaj   +1 more source

Xantenes and porphyrins, photoactivatable molecules used to control insect pests [PDF]

, 2011
Se analizaron dos sensibilizadores fotodinámicos, la Floxina B y la Hematoporfirina IX, como fotoinsecticidas de moscas plagas. Ambas sustancias adicionadas al alimento de las larvas presentaron alta toxicidad.
Bochicchio, Pablo Alejandro, Pujol Lereis, Luciana Mercedes, Rabossi, Alejandro   +2 more
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