Advanced Search
Display options
Filter resources
Text Availability
Article type
Publication date
Species
Language
Sex
Age
Showing 13 to 24 of 275 entries
Sorted by: Best Match Show Resources per page
Induced in-source fragmentation pattern of certain novel (1Z,2E)-N-(aryl)propanehydrazonoyl chlorides by electrospray mass spectrometry (ESI-MS/MS).

Chemistry Central journal

Abdelhameed AS, Attwa MW, Abdel-Aziz HA, Kadi AA.
PMID: 23351484
Chem Cent J. 2013 Jan 25;7(1):16. doi: 10.1186/1752-153X-7-16.

BACKGROUND: Collision induced dissociation (CID) in the triple quadrupole mass spectrometer system (QQQ) typically yields more abundant fragment ions than those produced with resonance excitation in the presence of helium gas in the ion trap mass spectrometer system (IT)....

2-(1H-1,3-Benzodiazol-2-ylsulfan-yl)-1-(4-chloro-phen-yl)ethanone.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Ng SW, Tiekink ER.
PMID: 22064924
Acta Crystallogr Sect E Struct Rep Online. 2011 Oct 01;67:o2639. doi: 10.1107/S160053681103666X. Epub 2011 Sep 14.

The mol-ecule in the structure of the title compound, C(15)H(11)ClN(2)OS, displays two planar residues [r.m.s. deviation = 0.014 Å for the benzimidazole residue, and the ketone group is co-planar with the benzene ring to which it is attached forming...

2-(6-Phenyl-7H-1,2,4-triazolo[3,4-b][1,3,4]thia-diazin-3-yl)-1,3-benzothia-zole.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Ng SW, Tiekink ER.
PMID: 22058756
Acta Crystallogr Sect E Struct Rep Online. 2011 Oct 01;67:o2610. doi: 10.1107/S1600536811036452. Epub 2011 Sep 14.

In the title compound, C(17)H(11)N(5)S(2), the dihedral angles formed between the triazole ring and the benzene ring and the 1,3-benzothia-zole ring system are 8.67 (8) and 13.90 (9)°, respectively. The conformation of the triazolo-thia-diazin-3-yl fused ring system is a...

(1Z,2E)-N'-{2-Chloro-1-methyl-2-[2-(4-methyl-phen-yl)hydrazin-1-yl-idene]ethyl-idene}-4-meth-oxy-benzohydrazide.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Ghabbour HA, Hemamalini M, Fun HK.
PMID: 22589991
Acta Crystallogr Sect E Struct Rep Online. 2012 Apr 01;68:o926. doi: 10.1107/S1600536812008367. Epub 2012 Mar 03.

The asymmetric unit of the title compound, C(18)H(19)ClN(4)O(2), contains two mol-ecules, in which the dihedral angles between the benzene rings are 43.60 (12) and 58.65 (13)°. The hydrazine N atoms are twisted slightly out of the planes of the...

3-Acetyl-5-methyl-1-(4-methyl-phen-yl)-1H-pyrazole-4-carboxamide.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Bari A, Ng SW.
PMID: 21589170
Acta Crystallogr Sect E Struct Rep Online. 2010 Oct 31;66:o3010. doi: 10.1107/S1600536810043928.

In the title compound, C(14)H(15)N(3)O(2), the phenyl-ene ring is disordered over two orientations. As a result, the almost planar pyrazole ring (r.m.s. deviation = 0.004 Å) forms dihedral angles of 59.8 (1) and -61.9 (1)° with the two orientations...

3-(5-Phenyl-4-phenyl-sulfonyl-1-p-tolyl-1H-pyrazol-3-yl)-1,2-dihydro-quinoxaline.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Bari A, Ng SW.
PMID: 21522440
Acta Crystallogr Sect E Struct Rep Online. 2011 Feb 23;67:o695. doi: 10.1107/S1600536811005940.

In the crystal structure of the title compound, C(30)H(24)N(4)O(2)S, the dihydro-quinoxaline fused-ring system is disordered over three orientations in a 0.358 (2):0.318 (3):0.324 (3) ratio; the mean planes of the non-H atoms of the disorder components are aligned at...

N-(3-Amino-bicyclo-[2.2.1]heptan-2-yl)-4-methyl-benzene-sulfonamide.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz AA, El-Azab AS, El-Sherbeny MA, Ng SW, Tiekink ER.
PMID: 22807858
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 01;68:o2032. doi: 10.1107/S1600536812025421. Epub 2012 Jun 13.

In the title compound, C(14)H(20)N(2)O(2)S, the sulfonamide O atoms lie to one side of the benzene ring and the amino-bicyclo-hepta-nyl to the other side [C(ar)-S-N-C torsion angle = -57.93 (11)°; ar = aromatic]. An intra-molecular N-H⋯N hydrogen bond is...

2-Methyl-3-(2-methyl-phen-yl)-4-oxo-3,4-dihydro-quinazolin-8-yl 4-chloro-benzoate.

Acta crystallographica. Section E, Structure reports online

El-Azab AS, Abdel-Aziz AA, Alanazi AM, Ng SW, Tiekink ER.
PMID: 22807877
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 01;68:o2052-3. doi: 10.1107/S1600536812025147. Epub 2012 Jun 13.

In the title compound, C(23)H(17)ClN(2)O(3), the quinazoline fused-ring system, including the ring-bound carbonyl-O and methyl-C atoms, is close to being planar (r.m.s. deviation = 0.044 Å) and is essentially orthogonal to both the 2-tolyl ring [dihedral angle = 89.51...

2-{2-[(E)-(2-Benzoyl-hydrazin-1-yl-idene)meth-yl]phen-oxy}acetic acid.

Acta crystallographica. Section E, Structure reports online

Fun HK, Chia TS, Alafeefy AM, Abdel-Aziz HA.
PMID: 22798909
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 01;68:o2260-1. doi: 10.1107/S1600536812028735. Epub 2012 Jun 30.

In the title compound, C(16)H(14)N(2)O(4), the dihedral angle between the aromatic rings is 12.45 (6)°. The central C(=O)-N-N=C bridge is roughly planar (r.m.s. deviation = 0.0346 Å) and makes dihedral angles of 13.01 (7) and 0.56 (7)° with the...

2-[(1H-Benzimidazol-2-yl)sulfan-yl]-1-phenyl-ethanone.

Acta crystallographica. Section E, Structure reports online

Abdel-Aziz HA, Chia TS, Fun HK.
PMID: 22798910
Acta Crystallogr Sect E Struct Rep Online. 2012 Jul 01;68:o2262. doi: 10.1107/S1600536812028747. Epub 2012 Jun 30.

The title compound, C(15)H(12)N(2)OS, adopts a twisted V-shape, with the S atom as the pivot. The benzimidazole ring system [maximum deviation = 0.015 (1) Å] makes a dihedral angle of 78.56 (7)° with the phenyl ring. The O atom...

Annulatascus nilensis sp. nov., a new freshwater ascomycete from the River Nile, Egypt.

IMA fungus

Abdel-Wahab MA, Abdel-Aziz FA, Mohamed SS, Abdel-Aziz AE.
PMID: 22679581
IMA Fungus. 2011 Jun;2(1):1-6. doi: 10.5598/imafungus.2011.02.01.01. Epub 2011 Mar 10.

Annulatascus nilensis sp. nov., from freshwater habitats in Egypt, is described, illustrated and compared to other species in the genus. Phylogenetic analyses of its LSU rDNA sequence with similar fungi placed the new species in the genus Annulatascus (Annulatascaceae,...

Tadalafil.

Profiles of drug substances, excipients, and related methodology

Abdel-Aziz AA, Asiri YA, El-Azab AS, Al-Omar MA, Kunieda T.
PMID: 22469265
Profiles Drug Subst Excip Relat Methodol. 2011;36:287-329. doi: 10.1016/B978-0-12-387667-6.00008-7. Epub 2011 Jun 23.

Tadalafil is PDE5 inhibitor that has recently been approved for the treatment of ED. The mechanism of action of tadalafil is similar to sildenafil and vardenafil through the inhibition of PDE. In both chemical structure and PDE subtype selectivity...

Showing 13 to 24 of 275 entries