Ene Synthesis of Bicyclic Arylmethylenedihydropyrazoles Using 4-Phenyl-4,5-dihydro-3H-1,2,4-triazole-3,5-dione |
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| Authors: | Martinez M G Klimova-Berestneva T Damian-Zea K Meleshonkova N N Klimova E I |
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| Institution: | (1) Institute of Chemistry, National Autonomous University of Mexico, Mexico City, Mexico;(2) National Autonomous, University of Mexico, Mexico. City, Mexico;(3) Moscow State University, Moscow, Russia |
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| Abstract: | 8-Acetyl-7-aryl-2-arylmethylene-8,9-diaza- and 4,8,9-triazabicyclo4.3.0]non-9-enes react with4-phenyl-4,5-dihydro-3H-1,2,4-triazole-3,5-dione, following the ene addition pattern. Under similar conditons 7-aryl-2-arylmethylene-8-methyl-8,9-diazabicyclo4.3.0]non-9-enes give rise to both mono- and polyadditionproducts. The product structures were studied by 1H and 13C NMR, IR, and UV spectroscopy and singlecrystal X-ray diffraction. |
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