Domino Knoevenagel/Michael synthesis of 2,2'-arylmethylenebis(3- hydroxy-5,5-dimethyl-2-cyclohexen-1-one) derivatives catalyzed by silica-diphenic acid and their single crystal X-ray analysis
RUPALI VAID MONIKA GUPTA RAJNI KANT VIVEK K GUPTA
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An efficient and eco-friendly procedure has been developed for the synthesis of various 2,2'- arylmethylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) derivatives which were isolated and characterizedby melting point, IR,$^{ 1}H-NMR$,$^{ 13}$C-NMR and mass spectrometric techniques. Out of the fourteencompounds synthesized, four compounds yielded crystals suitable for single crystal X-ray analysis whichshowed that 2,2'-phenylmethylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) crystallizes in the tetragonalsystem with space group I41/a, 2,2’-(3-nitrophenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) crystallizes in the monoclinic system with space group P21/n, 2,2’-(4-nitrophenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) crystallizes in the orthorhombic system with space group Pca21and 2,2’-(4-chlorophenyl)methylenebis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) crystallizes in the monoclinicspace group P21/c.
RUPALI VAID1 MONIKA GUPTA1 RAJNI KANT2 VIVEK K GUPTA2
Volume 135, 2023
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