A free radical alkylation of quinones with olefins
作者:Shuai Liu、Tong Shen、Zaigang Luo、Zhong-Quan Liu
DOI:10.1039/c9cc01704f
日期:——
We demonstrated herein an Fe(III)-mediated radical alkylation of quinones. A wide range of bioactive molecules with quinone motifs can be rapidly synthesized by using readily available and inexpensive NaBH4/NaBD4 with alkenes at room temperature under open flask conditions.
Synthesis of 2-Alkyl-1,4-naphthoquinones by Alkylboration
作者:Bernd Peter Ernst、Hartmut Laatsch
DOI:10.1055/s-1992-26136
日期:——
By reaction of 1,4-naphthoquinone (1) and trialkylboranes in the presence of oxygen and oxidative work-up, sterically hindered 2-alkyl-1,4-naphthoquinones and, on addition of magnesium bromide, 2,3-bisalkyl-1,4-naphthoquinones are obtained.
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