ABSTRACT
In this study isolation and structural elucidation of a homoisoflavonoid, 3-(3',4'-dihydroxybenzyl)-8-hydroxy-5,7-dimethoxychroman-4-one (Scillapersicone 1), is reported from Scilla persica HAUSSKN. The structure was solved by a single crystal X-ray analysis. The unit cell parameters are a=11.7676 (2)Å, b=20.1174 (4)Å, c=7.8645 (9)Å, ß=93.544 (2)°, V=1858.23 (7)Å(3), monoclinic space group P21/c and four symmetry equivalent molecules in an unit cell. The structure was consistent with the UV, IR, 1D and 2D NMR, HRFAB-MS data. The optimized molecular geometry agrees closely that obtained from the single crystal X-ray crystallography. Furthermore, cytotoxicity of this compound was evaluated by MTT assay on AGS and WEHI-164 cancerous cell lines.
Subject(s)
Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/pharmacology , Flavonoids/chemistry , Flavonoids/pharmacology , Scilla/chemistry , Antineoplastic Agents, Phytogenic/isolation & purification , Cell Line, Tumor , Cell Survival/drug effects , Crystallography, X-Ray , Flavonoids/isolation & purification , Humans , Models, Molecular , Neoplasms/drug therapy , Plant Extracts/chemistryABSTRACT
In the crystal structure of the title compound, C(18)H(18)O(4), the full mol-ecule is generated by the application of an inversion centre. The mol-ecule is essentially planar, with an r.m.s. deviation of 0.017â (1)â Å for all non-H atoms. The mol-ecules are linked through inter-molecular C-Hâ¯O inter-actions to form a mol-ecular sheet parallel to the ([Formula: see text]02) plane.
ABSTRACT
In the title compound, C22H20O3, the dihedral angle between the aromatic rings linked by the methine group is 81.265â (4)° and the eth-oxy side chain adopts an extended conformation [C-O-C-C = 177.24â (10)°]. In the crystal, weak C-Hâ¯π and C-Hâ¯O inter-actions link the mol-ecules into sheets.
ABSTRACT
The new title Schiff base compound, C11H15BrN2O2, crystallizes in the monoclinic space group P21 with two independent mol-ecules in the asymmetric unit. It was prepared by the condensation reaction of 5-bromo-2-hy-droxy-benzaldehyde and amino-ethyl-ethano-lamine. There is an intra-molecular O-Hâ¯N hydrogen bond with an S(6) ring motif. Moreover, there are inter-molecular C-Hâ¯N, C-Hâ¯O and Brâ¯O inter-actions in the crystal structure of the title compound.
ABSTRACT
The title compound, C(21)H(26)N(2)O(4), adopts an E configuration with respect to the azomethine C=N bonds. The dihedral angle between the two rings is 8.16â (8)°. The crystal structure is stabilized by weak inter-molecular C-Hâ¯O inter-actions.
ABSTRACT
The title Schiff base compound, C(22)H(28)N(2)O(4), was synthesized by the reaction of 3,4-dimethoxy-benzaldehyde and 1,4-diamino-butane in methanol. The mol-ecule is located on a center of inversion with one half-mol-ecule in the asymmetric unit. Both C=N double bonds are in a trans configuration. Inter-molecular C-Hâ¯O hydrogen bonds link the mol-ecules into a three-dimensional network.
ABSTRACT
The title compound, C(16)H(16)ClNO(3), is a Schiff base displaying a trans configuration of the C=N double bond. In the crystal structure, inter-molecular C-Hâ¯N and bifurcated C-Hâ¯(O,O) hydrogen bonds are observed.
ABSTRACT
The title compound, C(32)H(28)N(2)O, is a flexible Schiff base displaying a trans configuration across the C=N double bond. It was prepared in high yield by condensation of α-methyl-cinnamaldehyde and bis-(4-amino-phen-yl) ether in methanol at room temperature. The sample, with pseudo-ortho-rhom-bic cell parameters, exhibited merohedral twinning by rotation 180° around a*, with a refined twin domain fraction of 0.722â (1). The elongated shape of the elementary cell corresponds to the shape and direction of the mol-ecules. The dihedral angle between the O-linked aromatic rings is 57.86â (8)°.