Reactions of 2,3-dimethylenebutadiene dianion with electrophiles. Synthesis and conformations of 2,3-disubstituted-1,3-butadienes
作者:Robert B. Bates、Bernard Gordon、Thomas K. Highsmith、James J. White
DOI:10.1021/jo00190a025
日期:1984.8
Synthesis and Photodimerization of 2- and 2,3-Disubstituted Anthracenes: Influence of Steric Interactions and London Dispersion on Diastereoselectivity
作者:Thomas Geiger、Anne Haupt、Cäcilia Maichle-Mössmer、Claudio Schrenk、Andreas Schnepf、Holger F. Bettinger
DOI:10.1021/acs.joc.9b01317
日期:2019.8.16
of the size of primary alkyl substituents in 2- and 2,3-positions of anthracenes on the diastereoselectivity (anti vs syn dimer) of the [π4s + π4s] photoinduced dimerization is investigated. The synthesis of the anthracene derivatives was achieved by Suzuki–Miyaura reaction of 2,3-dibromoanthracene with alkylboronic acids as well as by reduction of anthraquinones that were obtained from 2,3-disubstituted