Mostrando 781 - 800 Resultados de 4,819 Para Buscar 'Pirimidina~', tiempo de consulta: 4.64s Limitar resultados
  1. 781
    por Gao, Shan, Ng, Seik Weng
    Publicado 2012
    “…The Ag(I) atom in the title centrosymmetric dinuclear compound, [Ag(2)(C(11)H(10)N(3)O)(2)(C(11)H(11)N(3)O)(2)]·2H(2)O, shows a T-shaped coordination arising from bonding to the N atom of a neutral 2-[(pyrimidin-2-yl)amino­meth­yl]phenol ligand, the N atom of the 2-[(pyrimidin-2-yl)amino­meth­yl]phenolate anion [N—Ag—N = 171.8 (1)°] and the terminal O atom of the other anion [Ag—O = 2.606 (3) Å]. …”
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  2. 782
    “…The title compounds, C(12)H(12)ClN(5)OS, (I), and C(12)H(12)ClN(5)OS, (II), are 2-[(di­amino­pyrimidin-2-yl)sulfan­yl]acetamides. Compound (II), crystallizes with two independent mol­ecules (A and B) in the asymmetric unit. …”
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  3. 783
  4. 784
  5. 785
  6. 786
    “…In the title mol­ecule, C(15)H(18)N(4)O(6), the fused 2,3-dihydro­furan ring has an envelope conformation and the spiro pyrimidine ring has a half-chair conformation. In the crystal, short inter­molecular O⋯C contacts of 2.835 (4) and 2.868 (4) Å between the carbonyl groups indicate the existence of electrostatic inter­actions, which link the mol­ecules into corrugated sheets parallel to the ab plane.…”
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  7. 787
  8. 788
    “…In the title compounds, C(11)H(12)N(6)OS (I) and C(10)H(11)N(7)OS (II), the di­amino­pyrimidine ring makes dihedral angles of 71.10 (9)° with the pyridine ring in (I) and 62.93 (15)° with the pyrazine ring in (II). …”
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  9. 789
    “…The present study aimed to investigate the possible antifibrotic properties in CCl(4)-induced liver fibrosis in male Sprague–Dawley rats compared to celecoxib of three novel methoxylated pyrazolo[3,4-d]pyrimidines. The three newly synthesized compounds were proved to be safe candidates. …”
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  10. 790
  11. 791
    “…A series of new [1,2,4]triazolo[4,3-a]pyrimidine derivatives was prepared using a one-pot three-component synthesis from 5-amino-1-phenyl-1H-1,2,4-triazoles, aromatic aldehydes and ethyl acetoacetate. …”
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  12. 792
    “…Herein, we present the synthesis, development, and structure–activity relationship of a series of highly selective pyrrolo[2,3-d]pyrimidines, showing subnanomolar enzymatic inhibition of this receptor and with excellent selectivity toward other kinases in the platelet-derived growth factor receptor (PDGFR) family. …”
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  13. 793
    “…An unprecedented oxidative cyclodimerization reaction of 2H-azirine-2-carboxylates to pyrimidine-4,6-dicarboxylates under heating with triethylamine in air is described. …”
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  14. 794
  15. 795
    “…Metabolomics analysis showed that aminoacyl-tRNA biosynthesis, valine, leucine and isoleucine biosynthesis, and arginine biosynthesis were the top three sensitive pathways to BDE-47 exposure, which resulted in the reduction in the amino acid pool level. Pyrimidine metabolism and purine metabolism pathways were also significantly influenced, and the purine and pyrimidine content were obviously reduced in the low (0.02 mg/L) and middle (0.1 mg/L) concentration groups while increased in the high (0.5 mg/L) concentration group, evidencing the disorder of nucleotide synthesis and decomposition in B. plicatilis. …”
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  16. 796
    “…The current study involves the design and synthesis of a newly synthesized pyrrolo[2,3-d]pyrimidine derivatives to contain chlorine atoms in positions 4 and 6 and trichloromethyl group in position 2 using microwave technique as a new and robust approach for preparation of this type of pyrrolo[2,3-d]pyrimidine derivatives. …”
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  17. 797
  18. 798
    por Garrett, Oscar, Whalen, Kristen E.
    Publicado 2023
    “…Previous work has established alkylquinolones as inhibitors of dihydroorotate dehydrogenase (DHODH), a fundamental enzyme catalyzing the fourth step in pyrimidine biosynthesis and a potential antiviral drug target. …”
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  19. 799
  20. 800
    “…Among the series of synthesized and tested oxazine–pyrimidine and piperazine–pyrimidine derivatives, compounds 3a and 5b inhibited breast cancer cell (MCF–7) viability with an IC(50) value of 9.17 and 6.29 µM, respectively. …”
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