Shafida Abd. Hamid

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A series of novel 1-(2'-α-O-D-glucopyranosyl ethyl) 2-arylbenzimidazoles has been prepared via one-pot glycosylation of ethyl-1-(2'-hydroxyethyl)-2-arylbenzimidazole-5-carboxylate derivatives. Synthesis of the 2-arylbenzimidazole aglycones from 4-fluoro-3-nitrobenzoic acid was accomplished in four high-yielding steps. The reduction and cyclocondensation(More)
Topoisomerases are nuclear enzymes that regulate topology of DNA by facilitating the temporary cleavage and ligation cycle of DNA. Among all forms of topoisomerases, TOP-IIA is extensively associated with cell proliferation and therefore is an important therapeutic target in diseases that involved cellular proliferation such as cancers. Nearly half of(More)
Research on the therapeutic applications of calixarene derivatives is an emerging area of interest. The anticancer activity of various functionalized calixarenes has been reported by several research groups. Due to their superior geometric shape, calixarenes can accommodate drug molecules by forming inclusion complexes. Controlled release of anticancer(More)
In the title compound, C(14)H(18)N(2)O(3), the carb-oxy-lic group is tilted by 12.00 (4)° with respect to the mean plane throught the benzimidazole ring system. The alcohol and carboxyl hydroxy groups are involved in intermolecular O-H⋯O and O-H⋯N hydrogen bonds, forming a two-dimensional network extending parallel the ab plane. The network is further(More)
In the crystal structure of the title compound, C(15)H(20)N(2)O(3)S, the hy-droxy group is involved in the formation of O-H⋯N hydrogen bonds, which link two mol-ecules into a centrosymmetric dimer. Weak C-H⋯O hydrogen bonds further link these dimers into chains propagating along the a axis. The crystal packing exhibits π-π inter-actions between the five-(More)
In the title compound, C(15)H(20)N(2)O(3), the benzimidazole ring is essentially planar, with a maximum deviation from the mean plane of 0.012 (1) Å. The crystal structure is stabilized by inter-molecular O-H⋯N hydrogen bonds, forming centrosymmetric dimers, which are connected in the [100] direction through weak C-H⋯O contacts.
In the title compound, C(20)H(21)BrN(2)O(2), the bromo-phenyl ring is twisted by 40.13 (8)° from the benzimidazole mean plane and the Br atom deviates by 0.753 (1) Å from that plane. The sec-butyl group is disordered over two conformations in a 0.898 (5):0.102 (5) ratio. In the crystal, mol-ecules related by translation along [[Formula: see text]10] are(More)
In the title compound, C(20)H(21)FN(2)O(2), the benzene ring and the benzimidazole ring system are inclined at a dihedral angle of 44.40 (9)°. In the crystal, mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds, forming a zigzag chain along the b-axis direction. An intra-molecular C-H⋯π inter-action is also observed.
In the title compound, C(11)H(14)N(2)O(5), the mol-ecular structure is stabilized by an intra-molecular N-H⋯O hydrogen bond, which generates an S(6) ring motif. The nitro group is twisted slightly from the attached benzene ring, forming a dihedral angle of 5.2 (2)°. In the crystal packing, inter-molecular O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules(More)