Transition-metal-free synthesis of thiocyanato- or nitro-arenes through diaryliodonium salts
作者:Xiao-Hua Li、Liang-Gui Li、Xue-Ling Mo、Dong-Liang Mo
DOI:10.1080/00397911.2016.1181764
日期:2016.6.2
ABSTRACT A transition-metal-free approach to facile synthesis of thiocyanato- and nitro-arenes was developed from KSCN (potassiumthiocyanate) or NaNO2 with diaryliodonium salts in good yields under mild conditions. The reaction was compatible with a variety of sensitive functional substituents such as halides and nitro and ester groups. The usefulness of arylation products has been realized. GRAPHICAL
Two visible-light mediated protocols (based on a copper photoredox catalyzed and on a photochemical reaction, respectively) for the preparation of aryl thiocyanates and aryl selenocyanates from arylazo sulfones are presented herein, by exploiting the peculiar photoreactivity and redox activity of such substrates. The developed reactions take place in good to satisfactory yields and with a large scope