Results 201 to 210 of about 3,269 (232)

The preparation of 1, 3, 4-oxadiazoles

Chemistry of Heterocyclic Compounds, 1970
Ya. A. Levin, M. S. Skorobogatova
openaire   +1 more source

1, 3, 4-Oxadiazole: A Versatile Compound With Potent Analgesic Activity

Oxadiazole is a heterocyclic ring with 5 members that has 1 oxygen atom, 2 nitrogen atoms, 2 double bonds, and 2 carbons. In furan, they are created by placing two methylene groups (=CH) for two nitrogen (-N=) atoms. The aromaticity was reduced by the substitution of these groups. There were four different isomer of oxadiazole that were identified: 1,3,
openaire   +1 more source

5‐(1‐Alkenyl)‐1, 3, 4‐oxadiazol‐2(3H)‐one

Helvetica Chimica Acta, 1974
Abstract3‐(2‐alkenoyl)‐thiocarbazic acid O‐methyl esters 1 are desulfurated by bromine and the unknown intermediates are transformed by alkali to 5‐(1‐alkenyl)‐1, 3, 4‐oxadiazol‐2(3H)‐ones (2). This type of oxadiazolone substitution is not realizable by the common ring closure of hydrazides with phosgene due to pyrazolidinone ring closure of ...
openaire   +1 more source

Microwave spectra of isotopic 1, 3, 4-oxadiazoles

Journal of Molecular Structure, 1972
Lise Nygaard, Rasmus Lykke Hansen, Jørgen Tormod Noelsen, John Rastrup-Andersen, O.Ole Sørensen, P.Alston Steiner   +5 more
openaire   +1 more source

[4 + 1] Cyclization of benzohydrazide and ClCF2COONa towards 1,3,4-oxadiazoles and 1,3,4-oxadiazoles-d5

Chinese Chemical Letters, 2022
Qiuling Song
exaly  

Microwave reactions of 2, 5-bis-trifluoromethyl-1, 3, 4-oxadiazole with norbornenes

2009
The reactions of 2, 5-bis-trifluoromethyl-1, 3, 4- oxadiazole 2 with norbornenes [1] under microwave conditions were investigated. MW reactions enabled the reaction times and temperatures to be significantly reduced, as compared to classical thermal reactions.
Margetić, Davor, Trošelj, Pavle, Marinić, Željko   +2 more
openaire   +1 more source

Aromatic poly(amide‐hydrazides) and poly(amide‐1,3‐4‐oxadiazoles)

Journal of Polymer Science Part B: Polymer Letters, 1967
Bill M. Culbertson, Rosemary Murphy
openaire   +1 more source

The synthesis of 1 : 2 : 4-oxadiazoles

Journal of the Chemical Society (Resumed), 1954
openaire   +1 more source

Theoretical study of synthesis and pharmaceutical activity of 1, 3, 4-oxadiazole derivatives

International Journal of Pharmaceutical and Clinical Research, 2022
Muntaha Yaseen Hayal, Farqad M Baqer, Bassam A Hassan   +2 more
openaire   +1 more source

Novel, fast and efficient one-pot sonochemical synthesis of 2-aryl-1,3,4-oxadiazoles

Ultrasonics Sonochemistry, 2014
Morteza Rouhani, Ali Ramazani, Sang Woo Joo   +2 more
exaly