An unusual [4 + 4] cycloadduct from an o-quinodimethane: Characterisation and computational studies
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Add time:07/24/2019 Source:sciencedirect.com
Trapping of a pyrimidinone-derived o-quinodimethane with tetraphenylcyclopentadienone gives a mixture of the [4 + 2] and formal [4 + 4] adducts. Computational studies show that the latter arises by a sequence of [4 + 2] cycloaddition, homolysis, radical recombination to a spiro-tetrahydrofuran and Claisen rearrangement under the thermolytic conditions.
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