Reaction of E-2-Arylidene-1-indanones, Z-Aurones, Z-1-Thioaurones and Z-2-Arylidene-2,3-dihydro-1H-indole-3-ones with Diazomethane.-The 1,3-dipolar cycloaddition of arylidene indanones and aurones (I) respectively affords trans-spiro-1-pyrazolines (III) as sole products. However the same reaction with arylidene thioaurones and -dihydroindolones yields trans cyclopropanes (V) as a result of the spontaneous denitrogenation of the initially formed pyrazolines. -(LEVAI, ALBERT; PATONAY, TAMAS; J. Heterocycl. Chem…
scite is a Brooklyn-based startup that helps researchers better discover and evaluate scientific articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by researchers from dozens of countries and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.