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Communication | Regular issue | Vol 26, No. 9, 1987, pp.2339-2342
Published online, 1st January, 1970
DOI: 10.3987/R-1987-09-2339
■ Cycloheptatriene Furanones and Bicyclo[5.3.0]decatrienone; Unusual Cycloaddition with 4-Phenyl-1,2,4-triazoline-3,5-dione (PTAD)

Antonio Saba and Ottorino De Lucchi

*Department of Chemistry, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy

Abstract

Cycloheptatriene furanones (1), (2), (3) and bicyclo[5.3.0]decatrienone (4) react with PTAD to afford the formal (4+2) or (6+2)-tropilidene cycloadducts in contrast with other substituted cycloheptatrienes which give only norcaradiene type adducts.