Chang Keun Sung

3,4-Dihydroxy­phenyl 3,4,5-trimethoxy­benzoate

In the title compound, C(16)H(16)O(7), the dihedral angle between the two benzene rings is 82.02u2005(7)°. The crystal structure is stabilized by inter-molecular O-H⋯O hydrogen bonds, which link the mol-ecules into a two-dimensional network.

2-(2,5-Dimeth­oxy­phen­yl)-N-[2-(4-hy­droxy­phen­yl)eth­yl]acetamide

In the title compound, C18H21NO4, the dihedral angles between the acetamide group and the methoxy- and hydroxy-substitured benzene rings are 80.81u2005(5) and 8.19u2005(12)°, respectively. The benzene rings are twisted with respect to each other, making a dihedral angle of 72.89u2005(5)°. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a three-dimensional network.

N-(4-Hy­droxy­phen­yl)-3,4,5-trimeth­oxy­benzamide

In the title amide compound, C16H17NO5, the dihedral angle between the benzene rings is 71.59u2005(4)°. In the crystal, intermolecular N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a two-dimensional array parallel to the ab plane.

1-(4-Hy-droxy-phen-yl)-3-(3,4,5-tri-methoxy-phen-yl)thio-urea.

In the title compound, C16H18N2O4S, the dihedral angle between the hydroxyphenyl ring and the plane of the thiourea moiety is 54.53u2005(8)°. The H atoms of the NH groups of thiourea are positioned anti to each other. In the crystal, intermolecular N—H⋯S, N—H⋯O, and O—H⋯S hydrogen bonds link the molecules into a three-dimensional network.

N-(3,4-Difluoro-phen-yl)-3,4,5-trimethoxy-benzamide.

In the title amide, C16H15F2NO4, the dihedral angle between the benzene rings is 2.33u2005(15)°. Molecules are linked in the crystal structure by N—H⋯O hydrogen bonding involving N—H and C=O groups of the amide function, leading to a supramolecular chain along [100].

1-(3-Hy-droxy-phen-yl)-3-(3-meth-oxy-phenyl)thio-urea.

In the title compound, C14H14N2O2S, the dihedral angles between the thiourea group and the methoxyphenyl and hydroxyphenyl rings are 61.91u2005(4) and 76.90u2005(4)°, respectively. The benzene rings are twisted with respect to each other, making a dihedral angle of 71.03u2005(4)°. The H atoms of the thiourea NH groups are positioned anti to each other. In the crystal, intermolecular N—H⋯S, N—H⋯O and O—H⋯S hydrogen bonds link the molecules into a three-dimensional network.

1-(2-Hy-droxy-2-phenyl-eth-yl)-3-(4-meth-oxy-phen-yl)urea.

In the title compound, C16H18N2O3, the dihedral angle between the 4-methoxyphenyl ring and the urea group is 35.6u2005(2) °. The H atoms of the urea NH groups are positioned syn to each other. In the crystal, intermolecular N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a two-dimensional array in the ac plane; the carbonyl-O atom is trifurcated.

1-[3-(Hy­droxy­meth­yl)phen­yl]-3-phenyl­urea

In the title compound, C14H14N2O2, the dihedral angle between the benzene rings is 23.6u2005(1)°. The H atoms of the urea NH groups are positioned syn to each other. In the crystal, intermolecular N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a three-dimensional network.

N-(2,5-Dimeth­oxy­phen­yl)-N′-[4-(2-hy­droxy­eth­yl)phen­yl]urea

In the title compound, C17H20N2O4, the 2,5-dimethoxyphenyl unit is essentially planar, with an r.m.s. deviation of 0.015u2005Å. The dihedral angle between the benzene rings is 43.66u2005(4)°. The molecular structure is stabilized by a short intramolecular N—H⋯O hydrogen bond. In the crystal, intermolecular N—H⋯O and O—H⋯O hydrogen bonds link the molecules into a three-dimensional network.

N-(3,4-Difluoro­phen­yl)-N′-(2,5-di­methoxy­phen­yl)urea

In the title compound, C15H14F2N2O3, the dihedral angle between the benzene rings is 64.5u2005(1)°. One F atom is disordered over two meta positions, with occupancy factors of 0.72 and 0.28. In the crystal, molecules are linked by N—H⋯O hydrogen bonds involving two N—H and one C=O groups of the urea central fragment, leading to a supramolecular chain along [011].