title: Reactive-state spin-dependent diastereoselective photoisomerization of trans,trans-2,3-diphenylcyclopropane-1- carboxylic acid derivatives included in zeolites.
abstract: [reaction: see text] The asymmetric induction facilitated by a chiral auxiliary during the photoisomerization of trans,trans-2,3-diphenylcyclopropane derivatives depends on the medium (solution vs zeolite) and the reactive state (singlet vs triplet). Within zeolites, direct excitation most likely proceeds via a zwitterionic intermediate, while triplet sensitization most likely proceeds via a diradical intermediate.
authors.affiliation: Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA.
authors.forename: J
authors.initials: J
authors.lastname: Sivaguru
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Shichi
authors.forename: V
authors.initials: V
authors.lastname: Ramamurthy