A convenient route to the 1,2,5-oxadiazole-substituted 1,2,4-triazolo[1,5-a]pyrimidine derivatives
Sign Up to like & getrecommendations! Published in 2019 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/s10593-019-02590-7
Abstract: A convenient synthesis of 1,2,4-triazole and 1,2,4-triazolo[1,5-a]pyrimidines with 3-amino-1,2,5-oxadiazole substituent starting from available 4-amino-1,2,5-oxadiazole-3-carbohydrazide and benzoyl cyanamide has been developed. read more here.
Keywords: route oxadiazole; triazolo pyrimidine; pyrimidine derivatives; substituted triazolo ... See more keywords
3-Aryl-5-aminobiphenyl Substituted [1,2,4]triazolo[4,3-c]quinazolines: Synthesis and Photophysical Properties
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DOI: 10.3390/molecules28041937
Abstract: Amino-[1,1′]-biphenyl-containing 3-aryl-[1,2,4]triazolo[4,3-c]quinazoline derivatives with fluorescent properties have been designed and synthesized. The type of annelation of the triazole ring to the pyrimidine one has been unambiguously confirmed by means of an X-ray diffraction (XRD) method;… read more here.
Keywords: substituted triazolo; aryl aminobiphenyl; emission; triazolo quinazolines ... See more keywords
Design, Synthesis, and Photophysical Properties of 5-Aminobiphenyl Substituted [1,2,4]Triazolo[4,3-c]- and [1,2,4]Triazolo[1,5-c]quinazolines
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DOI: 10.3390/molecules29112497
Abstract: Two series of novel [1,2,4]triazolo[4,3-c]- and [1,2,4]triazolo[1,5-c]quinazoline fluorophores with 4′-amino[1,1′]-biphenyl residue at position 5 have been prepared via Pd-catalyzed cross-coupling Suzuki–Miyaura reactions. The treatment of 2-(4-bromophenyl)-4-hydrazinoquinazoline with orthoesters in solvent-free conditions or in absolute ethanol… read more here.
Keywords: triazolo quinazolines; substituted triazolo; synthesis photophysical; triazolo triazolo ... See more keywords