Cu(II)-Catalyzed 6π-Photocyclization of Non-6π Substrates
摘要:
This research successfully achieved a Cu(II)-catalyzed 6 pi-photocyclization of non-6 pi substrates. The photo-enolization converts ortho-alkylphenyl alkynl ketones into a triene-type intermediate which undergoes the subsequent 6 pi-photo- facilitates both photoenolization and 6 pi-photocyclization. This research highlighted the tandem reaction strategy and the importance of metal catalysis in photochemistry.
A concise synthesis of 1‐naphthols via cyclization of o‐iodoacetophenones and methyl ketones has been realized under very mild conditions. The cyclization process is initiated by a rare copper‐catalyzed arylation of simple methyl ketones with ortho‐iodoacetophenones.
A Ru(II)-catalyzed coupling of various α-carbonyl phosphoniums with sulfoxoniumylides has been realized for the facile synthesis of 1-naphthols in good to excellent yields. This oxidant-free transformation proceeds through Ru-catalyzed C–H activation of phosphoniums, Ru-carbene insertion, and intramolecular Wittig reaction processes.
Cu‐catalyzed synthesis of 1‐naphthols with terminal alkynes and 2‐bromoaryl ketones
作者:Peng Ma、Yuhang Wang、Jianhui Wang
DOI:10.1002/aoc.6792
日期:2022.9
A Cu-catalyzed straightforward synthesis of 1-naphthols via an 6-endo-dig cyclization of terminalalkynes with 2-bromoaryl ketones in water is reported. The Cu(I) catalytic system tolerates various electron-withdrawing and electron-donating functional groups on both substrates and exhibits unique 6-endo-dig selectivity to give 1-naphthols in moderate to good yields.