title: Synthesis and chiroptical properties of optically active, regioregular oligothiophenes.
abstract: [reaction: see text] A series of regioregular oligothiophenes bearing chiral oxazoline residues have been synthesized in high yields by a stepwise synthesis using the Stille cross-coupling reaction. The chiroptical properties of the oligothiophenes up to the octamer were investigated with UV-visible and CD spectroscopies. The octamer showed split-type Cotton effects in chloroform as a good solvent in the presence of a poor solvent such as acetonitrile, while the lower molecular weight oligomers exhibited almost no induced CD.
authors.affiliation: Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Sakurai
authors.forename: H
authors.initials: H
authors.lastname: Goto
authors.forename: E
authors.initials: E
authors.lastname: Yashima