Synthesis and spectral studies on some tetrahydrobenzoxanthen-11-ones: crystal and molecular structure of 9,9-dimethyl-12-(2-nitrophenyl)-8,9,10,12-tetrahydrobenzo[<Emphasis Type="Italic">a</Emphasis>]xanthen-11-one |
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| Authors: | A Sethukumar Millet M Chandy B Arul Prakasam Raghavaiah Pallepogu |
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| Institution: | (1) Department of Chemistry, Annamalai University, Annamalainagar, 608002, Tamilnadu, India;(2) National Single Crystal X-Ray Diffractometer Facility, School of Chemistry, University of Hyderabad, Hyderabad, 500046, India; |
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| Abstract: | A series of 12-aryl-8,9,10,12-tetrahydrobenzoa]xanthen-11-ones have been synthesized by the multicomponent reaction (MCR) of β-naphthol, aryl aldehydes, and dimedone by
using BF3:OEt2 as a catalyst. The derived compounds have been analyzed by IR, NMR (1D and 2D), and mass spectra. The single crystal X-ray
structural analysis of 9,9-dimethyl-12-(2-nitrophenyl)-8,9,10,12-tetrahydrobenzoa]-xanthen-11-one evidences the envelope conformation of the cyclohexane ring and the pyran ring tends to adopt flattened-boat
conformation. |
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