Ene synthesis of bicyclic arylmethylenedihydropyrazoles using 4-phenyl-4,5-dihydro-3H-1,2,4-triazole-3,5-dioneстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:8-Acetyl-7-aryl-2-arylmethylene-8,9-diaza- and 4,8,9-triazabicyclo[4.3.0]non-9-enes react with 4-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-diazabicyclo[4.3.0]non-9-enes give rise to both mono- and polyaddition products. The product structures were studied by H-1 and C-13 NMR, IR, and UV spectroscopy and single crystal X-ray diffraction.