Tandem Synthesis of 1,3-Disubstituted Naphthalenes via TfOH-Promoted Directed-Aldol and Friedel–Crafts Reactions
作者:Hongchen Li、Lidong Shan、Lin Min、Yunxiang Weng、Xinyan Wang、Yuefei Hu
DOI:10.1021/acs.joc.1c01713
日期:2021.11.5
A TfOH-promoted tandemsynthesis of 1,3-disubstituted naphthalenes is developed via a directed-aldol reaction and a Friedel–Crafts reaction. Two new C–C bonds and one new benzene ring are created efficiently in one pot due to the discovery of a TfOH-promoted highly chemoselective directed-aldol reaction between two different ketones with α-hydrogens.
Multisubstituted naphthalene synthesis from 4-hydroxy-2-pyrones through [4+2] cycloaddition with <i>o</i>-silylaryl triflates
作者:Koyo Numata、Shinya Tabata、Akihiro Kobayashi、Suguru Yoshida
DOI:10.1039/d3nj03831a
日期:——
for multisubstituted naphthalenesfrom 4-hydroxy-2-pyrones through cycloaddition with aryne intermediates is disclosed. Various highly functionalized 2-pyrones were synthesized through 4-hydroxy-2-pyrones in short steps. The resulting 2-pyrones reacted smoothly with a wide range of aryne intermediates generated from o-silylaryl triflates to provide multisubstituted naphthalenes by the Diels–Alder reaction