Results 91 to 100 of about 6,154 (202)

Synthesis, reactions and characterization of 2-methylthionicotino-nitrile, pyrazolopyridine and pyridopyrazolotriazine derivatives [PDF]

, 2008
4,6-Diaryl-1H-pyrazolo[3,4-b]pyridin-3-amines 4a-c wereobtained in very pure state and used as the good startingmaterials for the present study.
Abdel-Fattah, A. M., Attaby, F. A., Elneairy, M. A. A., Gouda, M. N.   +3 more
core  

1,2,4-Triazine Chemistry Part II: Synthetic approaches for phosphorus containing 1,2,4-triazine derivatives

European Journal of Chemistry, 2010
This review represents the methods developed for the synthesis of phosphorus containing 1,2,4-triazine moieties. These methods depends on the phosphorylation of side functional groups of 1,2,4-triazines and cyclization of side functional groups of 1,2,4-triazines with phosphorus reagents to give isolated and fused phosphorus heterocyclic systems.
Reda Mohammady Abdel-Rahman, Magdy Ahmed Ibrahim, Tarik El-Sayed Ali   +2 more
openaire   +1 more source

Design, synthesis and anticonvulsant activity of some new 6,8-halo-substituted-2H-[1,2,4]triazino[5,6-b]indole-3(5H)-one/-thione and 6,8-halo-substituted 5-methyl-2H-[1,2,4]triazino[5,6-b]indol-3(5H)-one/-thione [PDF]

, 2014
A new series of 6,8-halo-substituted-2H-[1,2,4]triazino[5,6-b]indole-3(5H)-one/-thione and 6,8-halo-substituted 5-methyl-2H-[1,2,4]triazino[5,6-b]indol-3(5H)-one/-thione (5a-5l) were designed and synthesized keeping in view of the structural ...
Jain, Sandeep, Kumar, Rajeev, Roy, R. K., Singh, Hariram, Singh, Tejendra   +4 more
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Convenient synthesis of some new pyrazolo[5,1-c]triazines, isoxazolo[3,4-d] pyrimidine and pyridine derivatives containing benzofuran moiety [PDF]

, 2012
Pyrazolo[5,1-c][1,2,4]triazine, [1,2,4]triazolo[3,4-c][1,2,4]triazine, benzo[4,5]-imidazo[2,1-c][1,2,4]triazine, isoxazole, isoxazolo[3,4-d]pyridazine, pyrazole, pyridine, substituted urea and phenyl carbamate derivatives containing benzofuran moiety ...
Abdelhamid, Allen, Fujikawa, Hibino, Rao, Sakane, Taylor, Tseng, Tseng   +8 more
core   +1 more source

Synthesis of 6-(2-Methoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione as a New Reagent for Spectrophotometric Determination of Copper

International Journal of Analytical Chemistry, 2014
A simple, sensitive, accurate, and green spectrophotometric method for the determination of Cu(II) using newly synthesized reagent, 6-(2-methoxynaphthyl)-2,3-dihydro-1,2,4-triazine-3-thione (MNDTT), has been developed.
Maliheh Barazandeh Tehrani, Hutan Ghanbari, Effat Souri, Fazel Shamsa, Mohsen Amini   +4 more
doaj   +1 more source

SYNTHETIC STUDIES IN THE 6H-[1,2,4] TRIAZINO [3,4-b] [ 1,3,4] THIADIAZINES [PDF]

Journal of Sciences, Islamic Republic of Iran, 1996
4-Amino-6-methyl- 1,2,4-triazine-3(2H)-thione-5-0ne (1) was condensed with propargyl bromidein the presence of sodium rnethoxide to afford 3-propargylmercapto- 4-arnino-6-rnethyl-1,2,4-triazin-5-one(2) .
doaj  

Heteroaromatization with 4-Hydroxycoumarin Part II: Synthesis of Some New Pyrano[2,3-d]pyrimidines, [1,2,4]triazolo[1,5-c]pyrimidines and Pyrimido[1,6-b]-[1,2,4]triazine Derivatives

Molecules, 2001
A variety of novel [1,2,4]triazolo[1,5-c]pyrimidine-13-ones (4a-f) and (5b-d) could be obtained via reaction of 9-amino-7-(4’-chlorophenyl)-8,9-dihydro-8-imino-6H,7H-[1]benzopyrano[3`,4`:5,6]pyrano[2,3-d]pyrimidine-6-one (3) with a variety of ...
A. H. Bedair, A. H. Fakery, N. A. El-Hady, M. S. Abd El-Latif, A. M. El-Agrody   +4 more
doaj   +1 more source

Formulation and characterization of an apigenin-phospholipid phytosome (APLC) for improved solubility, in vivo bioavailability, and antioxidant potential [PDF]

, 2016
The apigenin-phospholipid phytosome (APLC) was developed to improve the aqueous solubility, dissolution, in vivo bioavailability, and antioxidant activity of apigenin.
Anand, Sridhar, Dave, Vivek S., Fegade, Harshal, Patin, Arun T., Pethe, Anil M., Telange, Darshan R.   +5 more
core   +2 more sources

Кінетичний аналіз накопичення дефектів в радіаційній технології модифікації структури кристалів опроміненням [PDF]

, 2010
Запропонована кінетична модель процесу формування точкового дефекту внаслідок релаксації електронних збуджень в конденсованих системах. Проведений аналіз дозових кривих інтенсивності смуг люмінесценції в кристалах інертних елементів.
Близнюк, Ольга Миколаївна, Масалітіна, Наталія Юріївна, Огурцов, Олександр Миколайович   +2 more
core  

Revisiting the structure and chemistry of 3(5)-Substituted Pyrazoles [PDF]

, 2019
Pyrazoles are known as versatile scaffolds in organic synthesis and medicinal chemistry, often used as starting materials for the preparation of more complex heterocyclic systems with relevance in the pharmaceutical field.
Alam, Alina Secrieru, Alkorta, Andes, Anwar, Behr, Brown, Castillo, Catalan, Chauhan, Clark, Elguero, Elnagdi, Favre, Fichez, Hall, Horta, Katritzky, Katritzky, Kost, Kumar, Larina, Maria Lurdes Santos Cristiano, Mert, Minkin, Minkin, Mohamed, Nagy, Nimbalkar, Paul Michael O’Neill, Schofield, Simons, Szajda, Taylor, Zerbi   +34 more
core   +2 more sources