Abstract
The title compounds were found to undergo a [2+2] photocycloaddition with olefins at λ = 419 nm in CH2Cl2 as the solvent. The resulting cyclobutanes were isolated in yields of 32–87% (11 examples) and showed a defined relative configuration at C1/C4 in the major diastereoisomer (nitro and aryl trans). The analysis of side products and triplet sensitization experiments support a mechanistic scenario in which a 1,4-diradical is formed as a key intermediate.
Funder
H2020 European Research Council
Cited by
11 articles.
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