نتایج جستجو برای: 134 oxadiazoles

تعداد نتایج: 13377  

2010
Hoong-Kun Fun Mohd Mustaqim Rosli Sankappa Rai Arun M Isloor Prakash Shetty

In the title compound, C(9)H(6)Cl(2)N(2)O, the dihedral angle between the oxadiazole and benzene rings is 1.7 (2)°. In the crystal, the mol-ecules are linked into chains along the b axis by short inter-molecular Cl⋯O contacts [3.019 (3) Å].

2010
Hoong-Kun Fun Mohd Mustaqim Rosli Sankappa Rai Arun M. Isloor Prakash Shetty

In the title compound, C(14)H(8)Cl(2)N(2)O, the dihedral angles between the plane of the oxadiazole ring and those of the benzene rings are 2.3 (1) and 9.5 (1)°. In the crystal, mol-ecules are linked into chains along the c axis by C-H⋯Cl inter-actions. These chains are stacked along the a axis.

Journal: :Chemical communications 2008
Matthias Lehmann Christiane Köhn Horst Kresse Zinaida Vakhovskaya

A series of biaxial V-shaped, shape-persistent molecules has been synthesised by stepwise coupling of phenylene ethynylene arms to an oxadiazole bending unit. Studies of their thermotropic nematic phases point to phase biaxiality.

Journal: :Molecules 2008
Zu-Ming Liu Qiong Chen Chao-Nan Chen Hai-Yang Tu Guang-Fu Yang

The syntheses of some diheterocyclic compounds from 2-thioacetohydrazide- 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (1) are described. Compound 1 can be converted into triazoles, 1,3,4-oxadiazoles, and 1,3,4-thiadiazoles. The structures of the intermediates and the target compounds were confirmed by (1)H-NMR, MS and elemental analyses.

Journal: :Molecules 2005
Abdel-Rahman S Ferwanah Adel M Awadallah

This review article discusses the reaction of nitrilimines and nitrile oxides with hydrazines, hydrazones, and oximes. Three reaction modes were observed. The article mainly covers our work published over the last fifteen years, in which interesting heterocyles such as oxadiazoles, triazoles, and tetrazines were synthesized and fully characterized.

Journal: :Chemical communications 2005
Verena Görtz John W Goodby

The elusive biaxial nematic liquid crystal phase was recently discovered in a family of substituted oxadiazoles. Our investigations of these materials show that the achiral biaxial nematic phase can segregate into chiral domains of opposite handedness, thereby demonstrating that the liquid-like nematic phase exhibits the properties of a conglomerate.

2012
J. MLOCHOWSKI

Oxidative transformations of the aldehydes, ketones, and their azomethine derivatives such as hydrazones, Schiff bases, azines, and oximes are presented and discussed. The oxidants used have been hydrogen peroxide in the presence of selenium compounds as catalysts, peroxycarboxylic acids, and eerie ammonium nitrate. Some of reported reactions have practical value in the synthesis of phenols, es...

Journal: :Organic & biomolecular chemistry 2012
Antonio Palumbo Piccionello Annalisa Guarcello Alessandro Calabrese Ivana Pibiri Andrea Pace Silvestre Buscemi

A new family of fluorinated low molecular weight (LMW) gelators has been synthesized through SNAr substitution of 5-polyfluoroaryl-3-perfluoroheptyl-1,2,4-oxadiazoles with glycine ester. The obtained compounds give thermal and pH-sensitive hydrogels or thermo-reversible organogels in DMSO. Oxygen solubility studies showed the ability to maintain high oxygen levels in solution and in gel blend w...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید