INTRAMOLECULAR DIELS-ALDER REACTIONS OF FURANS WITH ALLENYL ETHERS - FORMATION OF INDANONE AND TETRALONE
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Abstract
The intramolecular Diels-Alder reactions of the furans 3, 11a and 11b produced indanone 6 and tetralones 14a and 14b respectively, presumably via the corresponding allenyl ethers 4, 12a and 12b and the intramolecular cycloadducts 5, 13a and 13b.