Cycloaddition-Cycloreversion Sequence for One-pot Preparation of Dibenzobarrelene and Janusene Derivatives from Anthracenes and 2,3-Bis (methoxycarbonyl)-7-oxanorbornadiene
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Dibenzobarrelenes can be prepared by Diels-Alder reaction of anthracenes with 2,3-bis(methoxycarbonyl)-7-oxanorbornadiene followed by thermal cycloreversion in good yields; sterically-hindered 9,10-dimethylanthracene smoothly furnished a corresponding dimethyl derivative even in a better yield. In the same time, janusene derivatives were obtained as by-products by successive cycloaddition-cycloreversion processes under one-pot formation conditions.
- 九州大学の論文
- 1988-06-30
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