An efficient synthesis of highly functionalized unsymmetrical biphenyls having substituents on the ortho positions
作者:Masami Takahashi、Yasunori Moritani、Tsuyoshi Ogiku、Hiroshi Ohmizu、Kazuhiko Kondo、Tameo Iwasaki
DOI:10.1016/s0040-4039(00)61201-7
日期:1992.8
The highly functionalized unsymmetrical biphenyls having electron-donating and/or electron-withdrawing substituents on the ortho positions were effectively synthesized based on the intramolecular Ullmann coupling reaction directed by salicyl alcohol as a template, followed by selective cleavage of the two ester bonds of S.