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Communication | Regular issue | Vol 29, No. 7, 1989, pp.1243-1246
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5022
Intramolecular Cycloadditions with Isobenzofuran -VIII. Synthesis of Precurosors via an Oppé Reaction

Knut Hildebrandt and Willy Friedrichsen*

*Institut für Organische Chemie, Universität Kiel, Olshausenstrasse. 40, D-24098 Kiel, Germany


The diazoesters 3 and 9 were prepared via an Oppé reaction. Generation of isobenzofurans (e.g. 4) and subsequent intramolecular Diels-Alder reaction yields polycyclic systems (6, 10). Compound 10 can be transformed into an 11-oxasteroid 14.