Divergent stereochemistry of photocyclization from singlet and triplet states of 2-vinylbiphenyls. X-Ray crystal structure of cis-9-phenyl-10-methyl-9,10-dihydrophenanthrene

Autor: Christian Courseille, Rafik Koussini, Aziz Nourmamode, René Lapouyade
Rok vydání: 1980
Předmět:
Zdroj: Journal of the Chemical Society, Chemical Communications. :740
ISSN: 0022-4936
DOI: 10.1039/c39800000740
Popis: The singlet cyclization of Z(or E)-1-biphenyl-2-yl-1-phenylpropene proceeds stereoselectively to cis(or trans)-9-phenyl-10-methyl-9,10-dihydrophenanthrene (the cis-isomer has been characterized by X-ray crystallography) while the triplet cyclization gives a [trans]/[cis] ratio of 9 : 1 whatever the starting isomer.
Databáze: OpenAIRE