Mechanistic Aspects of Photocycloaddition Chemistry. An Interesting Relationship between Substituent Effects on 1,4-Biradical Closure-to-Cleavage Ratios and Photocycloaddition Regioselectivity

Article abstract of DOI:10.1016/S0040-4039(00)88260-X

The influence of β-substituents on closure-to-cleavage ratios of triplet 1,4-biradicals has been recorded and compared with how these substituents influence the regiochemistry of photocycloaddition of isobutylene and 5-substituted uracils.