Toyota, Shinji Onishi, Hiroyuki Kawai, Yoshihiro Morimoto, Takaaki Miyahara, Hiroaki Iwanaga, Tetsuo Wakamatsu, Kan Stereogenic Motif Consisting of Rigid Ring and Intraannular Chains: Isolation and Structures of Stereoisomers of 9-Alkyl-1,8-anthrylene−Butadiynylene Cyclic Dimers Stereoisomers of the title π-conjugated compounds with intraannular propyl and butyl groups were isolated by chromatography. The high barrier to isomerization is attributed to the steric hindrance between the alkyl chains and the rigid framework. butyl groups;intraannular propyl;Structures;steric hindrance;barrier;alkyl chains;Stereogenic Motif;chromatography;Cyclic;Alkyl;Isolation;Rigid Ring;framework;compound;isomerization;Dimer;Stereoisomer;Intraannular Chains 2009-01-15
    https://acs.figshare.com/articles/journal_contribution/Stereogenic_Motif_Consisting_of_Rigid_Ring_and_Intraannular_Chains_Isolation_and_Structures_of_Stereoisomers_of_9_Alkyl_1_8_anthrylene_Butadiynylene_Cyclic_Dimers/2885479
10.1021/ol802488z.s001