title: Rhodium-catalyzed reactions of dithiols and 1,4-bis(bromomethyl)benzenes leading to enantioenriched dithiaparacyclophanes.
abstract: We have achieved the first catalytic enantioselective synthesis of planar-chiral dithiaparacyclophanes by means of cationic rhodium(I)/(S)-BINAPHANE complex-catalyzed reactions of dithiols and 1,4-bis(bromomethyl)benzenes. The present method represents the first example of asymmetric synthesis of planar-chiral cyclophanes through catalytic enantioselective construction of the ansa chains.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, and Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan. tanaka-k@cc.tuat.ac.jp
authors.forename: Ken
authors.initials: K
authors.lastname: Tanaka
authors.forename: Tomoko
authors.initials: T
authors.lastname: Hori
authors.forename: Takuya
authors.initials: T
authors.lastname: Osaka
authors.forename: Keiichi
authors.initials: K
authors.lastname: Noguchi
authors.forename: Masao
authors.initials: M
authors.lastname: Hirano