Tetrahedron Letters p. 3065 - 3068 (1987)
Update date:2022-08-04
Topics:
Pratt, Daniel V.
Hopkins, Paul B.
Thermal Claisen rearrangement of substrates 5 and 6 each prepared in seven steps from the Diels-Alder adduct of methoxybenzoquinone and 1,3 butadiene, affords products 7 and 8 respectively.These disparate results demonstrate that the stereochemical outcome of Claisen rearrangements of this type may be controlled by the spatial requirements of substituents external to the pericyclic array.
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