Enantio- and diastereodifferentiating cis,trans-photoisomerization of 2beta,3beta-diphenylcyclopropane-1alpha-carboxylic acid derivatives in organized media.
[reaction: see text] Four methods of asymmetric induction in the cis, trans-photoisomerization of 2beta, 3beta-diphenylcyclopropane-1alpha-carboxylic acid derivatives were studied. Best results (ca. 80% de) were obtained by irradiation of chiral esters, amides, and salts in NaY and LiY zeolites and in the pure crystalline state.
Cheung
E
E
Department of Chemistry, University of British Columbia, Vancouver, Canada V6T 1Z1.
Chong
K C
KC
Jayaraman
S
S
Ramamurthy
V
V
Scheffer
J R
JR
Trotter
J
J