نتایج جستجو برای: triazine

تعداد نتایج: 2708  

Journal: :Berichte der deutschen chemischen Gesellschaft 1903

Journal: : 2022

This work includes synthesis a series of some new derivatives triazine from reaction between the sulfur amino acid (L-cysteine) and different aldehydes in dry ethanol to obtain thiazolidine ring as diastereo isomers (Cis Trans)- 2- alkylthiazolidine-4- carboxylic acids (1).
 The (1) suffered esterfication presence drops concentrated sulfuric catalyst give esters :
 ethyl alkylthiazoli...

Journal: :The Journal of organic chemistry 2008
Tal Hermon Edit Y Tshuva

Ethylene-bridged bis(hydroxylamino-1,3,5-triazine) compounds, that may serve as tetradentate ligands, were synthesized in three steps from 2,4,6-trichloro-1,3,5-triazine. These compounds demonstrate different rotation restrictions around the C(Ar)-N bonds due to their distinctive electronic structure as apparent from their resonative contributors. A dinuclear complex Ti 2(mu-L)2(OiPr)4 (L = bis...

2011
Kwang Ha

The Mn(II) ion in the title complex, [MnBr(2)(C(18)H(12)N(6))], is five-coordinated in a distorted square-pyramidal geometry by three N atoms of the tridentate 2,4,6-tri-2-pyridyl-1,3,5-triazine (tptz) ligand and two bromide anions. In the crystal, the pyridyl rings coordinated to the Mn atom are inclined slightly to their carrier triazine ring [dihedral angles = 8.0 (3) and 7.5 (3)°], whereas ...

2013
J. L. P. van Oorschot H. van Leeuwen

The rate o f photosynthesis in intact leaves o f a triazine-resistant biotype o f Amaranthus retroflexus was about 15% lower than that o f a triazine-susceptible biotype. Differences in photosyn­ thesis between resistant and susceptible biotypes o f Polygonum lapathifolium, Poa annua and Solanum nigrum were not significant, and absent in Chenopodium album and Stellaria media. The results are br...

2013
Gunther Seitz Johanna Siegl

Pyridine-C-nucleosides, „Inverse“ [4+2] Cycloadditions, 1,2,4-Triazine-C-nucleosides, 2,,3’-Dideoxy-/?-D-ribofuranosyl-pyridines The anomeric imido esters 5 and 6, appropriate precursors for C-nucleoside synthesis, were prepared and utilized as heterodienophiles in a Diels-Alder reaction with inverse electron demand to yield the novel, protected 1.2.4-triazine C-nucleosides 8 and 9. They could ...

2011
Zbigniew Karczmarzyk Ewa Wolińska Andrzej Fruziński

The title compound, C(28)H(27)N(5)O, was synthesized using palladium cross-coupling amination of 3-bromo-5,6-diphenyl-1,2,4-triazine with 2-[(4S)-4-tert-butyl-4,5-dihydro-1,3-oxazol-2-yl]aniline. The oxazoline ring is almost planar, with a maximum atomic deviation of 0.023 (5) Å. The phenyl rings make dihedral angles of 29.0 (1) and 54.6 (1)° with the triazine ring while the benzene ring makes ...

2009
Akshay D Desai Dharmesh H Mahajan Kishor H Chikhalia

A new series of aliphatic thiourea and various aryl urea incorporating 1,3,5-s-triazine moiety is reported. This series has been obtained by the reaction of cyanuric chloride with thiophene-2-ethyl thiourea 1. Thus, the prepared 2-(thiophene-2ethyl thioureido)-4,6-dichloro-s-triazine 2 has been subsequently treated with morpholine to get 2-(thiophene-2-ethyl thioureido)-4-(morpholino)-6-chloro-...

2015
Niyada Hin Bridget Duvall Dana Ferraris Jesse Alt Ajit G. Thomas Rana Rais Camilo Rojas Ying Wu Krystyna M. Wozniak Barbara S. Slusher Takashi Tsukamoto

A series of 2-substituted 6-hydroxy-1,2,4-triazine-3,5(2H,4H)-dione derivatives were synthesized as inhibitors of D-amino acid oxidase (DAAO). Many compounds in this series were found to be potent DAAO inhibitors, with IC50 values in the double-digit nanomolar range. The 6-hydroxy-1,2,4-triazine-3,5(2H,4H)-dione pharmacophore appears metabolically resistant to O-glucuronidation unlike other str...

Journal: :Journal of the Japan Society of Colour Material 1969

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید