Results 21 to 30 of about 8,535 (227)

A facile synthesis of N-Z/Boc-protected 1,3,4-oxadiazole-based peptidomimetics employing peptidyl thiosemicarbazides [PDF]

, 2010
Synthesis of 1,3,4-oxadiazole containing peptidomimetics is described by a p-TsCl/pyridine-mediated cyclization of the corresponding dipeptidyl thiosemicarbazides, which are readily prepared by coupling N-protected amino acid hydrazides with amino acid ...
Lamani, R.S., Nagendra, G., Sureshbabu, V.V.   +2 more
core   +1 more source

Diazo Transfer From Nitrous Oxide Employing Phosphorus Ylides

Angewandte Chemie, EarlyView.
A phosphorus ylide‐mediated strategy achieves the direct fixation of nitrous oxide (N2O) to access diazo compounds, which after intra‐ or intermolecular trapping, afford N2‐containing organic building blocks. This approach provides an alternative to hazardous diazo‐transfer reagents and establishes N2O fixation as a sustainable methodology.
Jhen‐Kuei Yu, Jan Niclas Ludwig, Patrick Wolf Antoni, David Tymann, Max Martin Hansmann   +4 more
wiley   +2 more sources

A study of cell membranes in nasal epithelial cells from patients with chronic rhinosinusitis with nasal polyps by means of a fluorescent probe [PDF]

, 2009
Aim. To assess the state of membranes in nasal epithelial cells obtained from the patients with chronic rhinosinusitis with nasal polyps (CRSwNP) with the help of the fluorescent probe 2-(2ʹ-ОН-phenyl)-5-phenyl-1,3-oxazole. Methods. The state of membrane
Onishchenko, A. I., Tkachenko, A. S., Nakonechna, O. A., Korniyenko, Y. M., Ryshchenko, I. M., Tsygankov, A. V., Posokhov, Y. O.   +6 more
core   +2 more sources

Efficient Synthesis of Novel 1,3,4-Oxadiazoles Bearing a 4-N,N-Dimethylaminoquinazoline Scaffold via Palladium-Catalyzed Suzuki Cross-Coupling Reactions

Molecules, 2020
Two series of novel (symmetrical and unsymmetrical) quinazolinylphenyl-1,3,4-oxadiazole derivatives were synthesized using palladium-catalyzed Suzuki cross-coupling reactions. The presented synthetic methodology is based on the use of bromine-substituted
Barbara Wołek, Mateusz Werłos, Magdalena Komander, Agnieszka Kudelko   +3 more
doaj   +1 more source

Arylation Reactions in the Synthesis of Biologically Important 2,5-Diaryl-1,3,4-Oxadiazoles

Applied Sciences, 2022
Apart from carbon atoms, some cyclic molecules contain other elements and play an extraordinary role in human life. Among these systems, 1,3,4-oxadiazole derivatives deserve special attention due to their biological properties such as antibacterial ...
Monika Olesiejuk, Agnieszka Kudelko
doaj   +1 more source

5-Phenyl-1,3,4-oxadiazol-2-amine [PDF]

Acta Crystallographica Section E Structure Reports Online, 2012
In the title complex, C(8)H(7)N(3)O, the C-O [1.369 (2) and 1.364 (3) Å] and C=N [1.285 (3) and 1.289 (3) Å] bond lengths in the oxadiazole ring are each almost identical within systematic errors, although different substituents are attached to the ring. The phenyl ring is inclined to the planar oxadiazole ring [r.m.s. deviation 0.002 Å] by 13.42 (18)°.
Man-Man Song, Kong-Li Wu, Lin Zhu, Juan Zheng, Yan Xu   +4 more
openaire   +3 more sources

A convenient synthesis of 1,3,4-thiadiazole and 1,3,4-oxadiazole based peptidomimetics employing diacylhydrazines derived from amino acids [PDF]

, 2010
Synthesis of novel orthogonally protected 1,3,4-thiadiazole and 1,3,4-oxadiazole tethered dipeptide mimetics is described. Both the heterocycles are prepared via a set of diacylhydrazines derived from amino acids.
Lamani, R.S., Nagendra, G., Narendra, N., Sureshbabu, V.V.   +3 more
core   +1 more source

2,5-Bis(4-methoxyphenyl)-1,3,4-oxadiazole [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
En el compuesto del título, C(16)H(14)N(2)O(3), el anillo de 1,3,4-oxadiazol esencialmente plano [desviación máxima = 0.0021 (11) Å] está inclinado en ángulos diedros de 8.06 (6) y 11.21 (6)° con respecto a los dos anillos de benceno; el ángulo diedro entre los últimos anillos es de 11.66 (5)°.
B. Kalluraya, Hoong-Kun Fun, Nithinchandra, Jia Hao Goh   +3 more
openaire   +3 more sources

Antibacterial Activity and Mechanism of Action of Sulfone Derivatives Containing 1,3,4-Oxadiazole Moieties on Rice Bacterial Leaf Blight

Molecules, 2015
In this study, sulfone derivatives containing 1,3,4-oxadiazole moieties indicated good antibacterial activities against rice bacterial leaf blight caused by the pathogen Xanthomonas oryzaepv. pv. oryzae (Xoo).
Li Shi, Pei Li, Wenli Wang, Manni Gao, Zengxue Wu, Xianpeng Song, Deyu Hu   +6 more
doaj   +1 more source

Synthesis and Study of Some 4-Chlorophenoxy Methyl Substituted amido1,3,4-Oxadiazoles, 1,3,4-Thiadiazoles and 1,2,4-Triazoles from 4-Chloro phenoxy acetic acid [PDF]

مجلة التربية والعلم, 2013
: In this paper the synthesis of some substituted 1,3,4-oxadiazole, 1,3,4-thiadiazoles and 1,2,4-triazoles is reported. 4-Chlorophenol was treated with chloroacetic acid to give 4-chlorophenoxy acetic acid (C1) which was reacted with thionyl chloride ...
Mudhar A. Othman, Khalid M. Daoud
doaj   +1 more source