Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Bogdan Doboszewski"'
Publikováno v:
IUCrData, Vol 5, Iss 2, p x200257 (2020)
In the title compound [systematic name: 5-methyl-1,3-bis(2-oxopropyl)pyrimidine-2,4(1H,3H)-dione], C11H14N2O4, the two 2-oxopropyl groups are nearly perpendicular to the planar thymine unit. One methyl group of oxopropyl substituent is disordered. In
Externí odkaz:
https://doaj.org/article/4fd5b01bb5bf4a249b1b73808f0f21c1
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 74, Iss 9, Pp 1373-1379 (2018)
The asymmetric unit of the title compound {systematic name: 3-[(tert-butyldiphenylsilyl)oxy]propane-1,2-diol, C19H26O3Si}, contains eight chiral molecules (Z′ = 8). These molecules are connected via a complex system of hydrogen bonds into an infini
Externí odkaz:
https://doaj.org/article/ef577204728b44fdb8419a0aefa93ae3
Autor:
Luciano J. Hoeltgebaum Thiesen, Nadia Cabral, Maria Joselice e Silva, Gilson Bezerra, Bogdan Doboszewski
Publikováno v:
ARKIVOC, Vol 2017, Iss 4, Pp 249-264 (2017)
Externí odkaz:
https://doaj.org/article/02bf7e1453704f4ea9cbc3825fa4b25b
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 4, Pp o1109-o1110 (2012)
In the crystal structure of the title compound, C15H20O6S, the two independent molecules crystalllize in a chiral setting with two different conformations, twisted 4T3 and envelope 4E, for the furanose rings. Weak C—H...O contacts strengthen the cr
Externí odkaz:
https://doaj.org/article/d7b8861efd444bafbfdd924d779643a9
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 7, Pp o1653-o1654 (2011)
In the title compound, C20H24O5, the six-membered pyranose ring adopts a chair conformation. The dihedral angle between the planes of the phenyl groups of the benzyl substituents is 63.1°. Two types of intermolecular O—H...O hydrogen bonds lead to
Externí odkaz:
https://doaj.org/article/be9cc2fb535a4e0283531f3aafcb0cae
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 7, Pp o1565-o1565 (2011)
In the crystal structure of the title compound, C4H8N2O4·C18H15OP, two triphenylphosphine oxide molecules and two dimethyl hydrazine-1,2-dicarboxylate molecules are connected via N—H...O hydrogen bonds of moderate strength and are related via a tw
Externí odkaz:
https://doaj.org/article/b00b778d938c4c54a41ad955b130129e
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 1, Pp o3-o4 (2011)
In the two independent but very similar molecules of the title compound, C11H14N2O6, both nucleobase fragments are nearly planar (both within 0.01 Å) while the furanose rings exhibit 2E-endo envelope conformations. In the crystal, the two 3′-O-ace
Externí odkaz:
https://doaj.org/article/5c439e6758694d74a6af5b63e15b6144
Publikováno v:
Acta Crystallographica Section E, Vol 66, Iss 12, Pp o3217-o3218 (2010)
The title compound, C19H30O9, was prepared by substitution at the C6 position in 1,2;3,4-di-O-isopropylidene-6-O-trifluoromethanesulfonyl-d-galactose using sodium ethoxymalonate in dimethylformamide. The conformation is skew-boat 0S2, slightly distor
Externí odkaz:
https://doaj.org/article/aca06abe53b74243aa4be773dc8dea5f
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 2, Iss 1, Pp 1-2 (2010)
Externí odkaz:
https://doaj.org/article/b6783fb9ca814b31a98f15dc90e05534
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 2, Iss Suppl. 1, Pp 1-2 (2010)
Selectivity of alkylation at the N1 position in pyrimidines (thymine and uracil) was achieved by the application of N3-benzoyl thymine and N3-benzoyl uracil as substrates, where the N3 atom was temporarily protected, exposing the N1 atom as the alkyl
Externí odkaz:
https://doaj.org/article/72f021ae7a234002b4bc9476c9c40caf