97570-29-1Relevant articles and documents
Ultrasound-assisted rapid synthesis of 2-aminopyrimidine and barbituric acid derivatives
Bayramo?lu, Duygu,Kurtay, Gülbin,Güllü, Mustafa
, p. 649 - 658 (2020/02/11)
Novel, inexpensive, and relatively expeditious procedure to achieve the synthesis of different 2-aminopyrimidine and barbituric acid derivatives is presented here, starting from readily available compounds such as guanidine hydrochloride, urea, 1,3-dialkylurea, or thiourea. Under ultrasonic irradiation, base-driven (Na2CO3, NaOH, or NaOC2H5) heterocyclization reactions of the aforementioned substrates with diethyl malonate, diethyl-2-alkyl malonate, pentane-2,4-dione, or ethyl-3-oxobutanoate yielded corresponding products. Significant advantages of this sonochemical synthetic protocol with regard to the conventional thermal methods include easy reaction setup and work-up steps, reasonably mild conditions, shorter reaction times (~30 min) and comparably high product yields. The characterization of the synthesized compounds was based on melting points, FT-IR, GC-MS, 1H-NMR techniques, and the obtained data were also checked from the previously published studies.
5-Substituted 2-amino-4, 6-dihydroxypyrimidines and 2-amino-4, 6-dichloropyrimidines: Synthesis and inhibitory effects on immune-activated nitric oxide production
Jansa, Petr,Holy, Antonín,Dra?ínsky, Martin,Kolman, Viktor,Janeba, Zlatko,Kostecká, Petra,Kmoní?ková, Eva,Zídek, Zdeněk
, p. 4482 - 4490 (2015/04/14)
A series of 5-substituted 2-amino-4, 6-dihydr-oxypyrimidines were prepared by a modified condensation of the corresponding monosubstituted malonic acid diesters with guanidine in an excess of sodium ethoxide. The optimized procedure using Vilsmeier-Haack-Arnold reagent, followed by immediate deprotection of the (dimethylamino)methylene protecting groups, has been developed to convert the 2-amino-4, 6-dihydroxypyrimi-dine analogs to novel 5-substituted 2-amino-4, 6-dichloro-pyrimidines in high yields. Pilot screening for biological properties of the prepared compounds was done in mouse peritoneal cells using the in vitro nitric oxide (NO) assay. Irrespective of the substituent at the 5 position, 2-amino-4, 6-dichloropyrimidines inhibited immune-activated NO production. The most effective was 5-fluoro-2-amino-4, 6-dichloropyrimidine with an IC50 of 2 lM (higher activity than the most potent reference compound) while the IC50s of other derivatives were within the range of 9-36 μM. The 2-amino-4, 6-dihydroxypyrimidine counterparts were devoid of any NO-inhibitory activity. The compounds had no suppressive effects on the viability of cells. The Mechanism of action remains to be elucidated.
NOVEL COMPOUNDS AS RESPIRATORY STIMULANTS FOR TREATMENT OF BREATHING CONTROL DISORDERS OR DISEASES
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Page/Page column 128; 129, (2012/06/16)
The present invention includes compositions that are useful in the treatment of breathing control diseases or disorders in a subject in need thereof. The present invention also includes a method of treating a respiratory disease or disorder in a subject in need thereof, comprising administering to the subject a therapeutically effective amount of a pharmaceutical formulation of the invention, The present invention further includes a method of preventing destabilization or stabilizing breathing rhythm in a subject in need thereof, comprising administering to the subject a therapeutically effective amount of a pharmaceutical formulation of the invention.