Results 251 to 260 of about 58,940 (303)

Purine-Derived Ureides Under Drought and Salinity

2017
Abstract Purine-derived ureides (allantoin and allantoate) are the dominant nitrogenous (N) products transported from the root nodules to the aerial plant organs by rhizobia-nodulated (Rh + ) ureidic legumes. However, ureides are not exclusively synthesized in Rh + legumes as some evidence suggest a more universal ureide metabolism in C3 and C4 ...
Baral Bikash, Izaguirre-Mayoral Maria Luisa   +1 more
openaire   +1 more source

Ugi–Smiles Couplings of Purine Derivatives

Synlett, 2016
Purines may be involved in Ugi–Smiles coupling as shown by the successful formation of thiocarboxamide derivatives from 6-mercaptopurine. This multicomponent coupling affords a very straightforward access to functionalized adenine derivatives, which are widely represented among natural products of medicinal interest.
El Kaim, Laurent, Abdessalem, Abdelbari, Abderrahim, Raoudha, dos Santos, Aurélie, Grimaud, Laurence   +4 more
openaire   +2 more sources

Purine- and Pyrimidine-derived Natural Products

2022
Pyrimidine- and purine-based natural products could qualify as alkaloids (e.g. caffeine) but we take up these nucleoside natural products as a separate subclass, given the centrality of uracil/5-methyluracil, cytosine, adenine, and guanine in nucleic acid metabolism, and as starting points for varied nucleoside scaffolds and their roles as plant ...
openaire   +1 more source

ChemInform Abstract: FLUOROALKYL‐SUBSTITUTED PURINE DERIVATIVES

Chemischer Informationsdienst, 1976
Abstract8‐Bromtheophyllin (I) bildet mit dem Fluorepoxid (II) in Gegenwart von Pyridin das Purinderivat (III), das mit Dimethylsulfoxid/Acetanhydrid zum Keton (IV) oxidierbar ist.
U. WERNER, R. HALLER
openaire   +1 more source

Purine derivatives as dapk1 inhibitors

2016
Derivados de purina como inhibidores de Dapk-1. La presente invención describe una nueva familia de derivados de purina que actúan como inhibidores selectivos de Dapk1. Se describe también el proceso para la obtención de los compuestos farmacéuticos y su uso como medicamento para el tratamiento o la profilaxis de enfermedades que precisan la inhibición
Molina Pineda Infantas, Ignacio Jesús, Torres Rusillo, Sara, Fernández Rubio, Pablo, Pineda de las Infantas y Villatoro, María J., Díaz Mochón, Juan José, Unciti-Broceta, Asier   +5 more
openaire   +1 more source

Investigations in the purine series. II. Synthesis of some purine derivatives

Recueil des Travaux Chimiques des Pays-Bas, 1946
AbstractSyntheses of xanthine, 3,7‐, 1,3‐ and 1,7‐diethyl‐ and of 3‐ and 7‐monoethyl‐xanthines are described in this ...
openaire   +1 more source

Tetrahydro-2-pyranyl Derivatives of Purines

The Journal of Organic Chemistry, 1966
N, Nagasawa, I, Kumashiro, T, Takenishi
openaire   +2 more sources

Synthesis of derivatives of purine

Pharmaceutical Chemistry Journal, 1971
N. Ya. Bel'kina, Z. I. Zel'manova, E. S. Chaman, E. S. Golovchinskaya   +3 more
openaire   +1 more source

Purine- and Pyrimidine-derived Natural Products

2017
Although the monocyclic pyrimidine and bicyclic purine ring systems are the information-conferring elements in both DNA and RNA, there are small molecule variants that have distinct biological functions. These include the purine alkaloids theophylline and caffeine, the 7-deazaguanines, the plant alkylated adenine cytokinins, the antitumor and antiviral
openaire   +1 more source

Basisch substituierte Purin‐Derivate I

Archiv der Pharmazie, 1956
Gustav Ehrhart, Ingeborg Hennig
openaire   +1 more source