ABSTRACT
The title compound, C(23)H(23)BrO(4), is an inter-mediate in the synthesis of fused heterocycles. In the title mol-ecule, the cyclo-hexene ring has a distorted half-chair conformation. The bromo-phenyl ring and the mean plane of the cyclo-hexene ring form a dihedral angle of 13.8â (3)°, whereas the benzene and cyclo-hexene rings are approximately perpendicular [88.44â (17)°]. There are only weak C-Hâ¯O and C-Hâ¯π inter-molecular inter-actions.
ABSTRACT
The title compound, C(21)H(16)N(2)O(2), was derived from 1-(2-hydroxy-phen-yl)-3-(4-methoxy-phen-yl)propane-1,3-dione. The pyrazole ring and one of the hydr-oxy-substituted benzene rings are approximately coplanar, forming a dihedral angle of 7.5â (3)°. The relative conformation of these rings may be influenced by an intra-molecular O-Hâ¯N hydrogen bond. In the crystal structure, inter-molecular O-Hâ¯O hydrogen bonds involving different hydr-oxy groups of symmetry-related mol-ecules form extended chains along [201].
ABSTRACT
The title compound, C(21)H(22)O(5), was prepared by NaOH-catalysed cyclo-condensation of 3-(4-ethoxy-phen-yl)-1-(furan-2-yl)prop-2-en-1-one with ethyl acetoacetate. In the crystal, C-Hâ¯O and C-Hâ¯π inter-actions link the mol-ecules. In the title mol-ecule, the furan and cyclo-hexene rings are almost parallel [6.77â (11)°] and the cyclo-hexene ring is approximately perpendicular to the benzene ring [84.79â (5)°].