Di-pi-methane rearrangement
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
The di-pi-methane rearrangement is a photochemical reaction of a molecular entity comprising two π-systems, separated by a saturated carbon atom (a 1,4-diene or an allyl-substituted aromatic analog), to form an ene- (or aryl-) substituted cyclopropane. The rearrangement formally amounts to a 1,2 shift of one ene group (in the diene) or the aryl group (in the allyl-aromatic analog) and ‘bond formation’ between the lateral carbons of the non-migrating moiety.[1]
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