Crystal structure of 9-(3-bromo-5-chloro-2-hydroxy-phen-yl)-10-(2-hy-droxy-eth-yl)-3,3,6,6-tetra-methyl-3,4,6,7,9,10-hexa-hydro-acridine-1,8(2H,5H)-dione

Crystal structure and Hirshfeld surface analysis of ethyl 2-[9-(2-hy-droxy-phen-yl)-3,3,6,6-tetra-methyl-1,8-dioxo-2,3,4,4a,5,6,7,8a,9,9a,10,10a-dodeca-hydro-acridin-10-yl]acetate

In the title compound, C27H33NO5, a 3,3,6,6-tetra-methyl-tetra-hydro-acridine-1,8-dione ring system carries an ethyl acetate substituent on the acridine N atom and an o-hy-droxy-phenyl ring on the central methine C atom of the di-hydro-pyridine ring. The benzene ring is inclined to the acridine ring system at an angle of 80.45 (7)° and this conformation is stabilized by an intra-molecular O-H⋯O hydrogen bond between the hy-droxy substituent on the benzene ring and one of the carbonyl groups of the acridinedione unit. The ester C=O oxygen atom is disordered over major and minor orientations in a 0.777 (9):0.223 (9) ratio and the terminal -CH3 unit of the ethyl side chain is disordered over two sets of sites in a 0.725 (5): 0.275 (5) ratio. In the crystal, C-H⋯O hydrogen bonds combine to link the mol-ecules into a three-dimensional network. van der Waals H⋯H contacts contribute the most to the Hirshfeld surface (66.9%) followed by O⋯H/H⋯O (22.1%) contacts associated with weak hydrogen bonds.

A Facile and Catalyst-free Synthesis of Hexahydroacridine-1,8(2H,5H )-dione and Octahydroacridin-10(1H )-yl)thiourea Derivatives: Inter- and Intramolecular Aza-Michael addition

An easy and convenient technique for the one-pot synthesis of novel compounds of hexahydroacridine-1,8(2H,5H)-dione and octahydroacridin-10(1H)-yl) thiourea derivatives has been developed by the reaction of the octahydro-1H-xanthenes with hydroxylamine hydrochloride and thiosemicarbazide in ethylene glycol, which is a green solvent, under mild reaction conditions. IR, 1H NMR, 13C NMR spectrometry, and X-ray diffraction analysis were used to identify the structures of these compounds.

The structure of 9-(3-bromo-6-chloro-2-hy-droxy-phen-yl)-10-(2-hy-droxy-ethyl)-3,6-diphenyl-3,4,5,6,7,9-hexa-hydro-2H-acridine-1,8-dione

In the structure of the title compound C33H29BrClNO4, (I), the hexa-hydro-2H-acridine ring system has a hy-droxy-ethyl substituent on the N atom and a 3-bromo-6-chloro-2-hy-droxy-phenyl substituent on the central C atom at the 9-position. An unusual feature of the mol-ecule is that the substituents at the 3- and 5-positions of the outer cyclo-hexenone rings are phenyl rings rather than the more common dimethyl substituents. C atoms on both of the cyclo-hexenone rings are disordered over two sites. In the crystal structure, O-H⋯O, C-H⋯O and C-H⋯π(ring) hydrogen bonds combine with an Br-O and unusual C-Br⋯π(ring) halogen bonds to generate a three dimensional network with mol-ecules stacked along the a-axis direction.