Title compounds possessing a variety of substituents are systematically prepared by means of Meerwein arylation of benzene-1,4-dione. Synthetic aspects and their MNDO calculation-based interpretation are described.
Synthesis of Disubstituted Benzoquinones by the Photochemical Reaction of Acetylenes with Fe(CO)<sub>5</sub>
作者:Kazuhiro Maruyama、Toru Shio、Yoshinori Yamamoto
DOI:10.1246/bcsj.52.1877
日期:1979.6
acetylenes substituted with alkyl groups and terminal acetylenes substituted with alkyl, aryl, and functionallized alkyl groups are converted to disubstituted quinones by the photochemical reaction with Fe(CO)5 followed by treatment with Ce(IV).
Blue Light-Emitting Diode-Induced Direct C–H Functionalization of 1,4-Quinones with Aryl and Alkyl Boronic Acids
作者:Souvik Guha、Tejas Prabakar、Subhabrata Sen
DOI:10.1021/acs.joc.2c01972
日期:2022.11.18
cross coupling reactions occur with aryl and alkyl boronicacids without assistance from any photocatalysts. 2-Alkylated cyclohexene-1,4-diones were obtained when the 1,4-quinones were reacted with alkyl boronicacids under standard reaction conditions. However, slight warming of the reaction mixture afforded the desired alkylated 1,4-quinones. The reaction is believed to proceed through the blue LED-induced