A hydrogenbonddonorsolvent assisted (radio)halogenation and deuteration of organoborons has been developed. The reactions exhibited high functional group tolerance and needed only an ambient atmosphere. Most importantly, compared to literature methods, our conditions are more consistent with the principals of green chemistry (e.g., metal‐free, strong oxidant‐free, more straightforward conditions)
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
Synthesis of perfluoroalkyl thioethers from aromatic thiocyanates by iron-catalysed decarboxylative perfluoroalkylation
作者:Benjamin Exner、Bilguun Bayarmagnai、Christian Matheis、Lukas J. Goossen
DOI:10.1016/j.jfluchem.2016.12.006
日期:2017.6
Easily available aryl and heteroaryl thiocyanates were converted into the corresponding perfluoroalkyl thioethers via decarboxylation of potassium perfluoroalkylcarboxylates, catalysed by the inexpensive and environmentally benign iron(III) chloride.
One-pot synthesis of (ethoxycarbonyl)difluoromethylthioethers from thiocyanate sodium and ethyl 2-(trimethylsilyl)-2,2-difluoroacetate (TMS-CF 2 CO 2 Et)
作者:Lijun Xu、Hongyu Wang、Changwu Zheng、Gang Zhao
DOI:10.1016/j.tet.2017.08.048
日期:2017.10
An efficient one-pot cascade methodology for the synthesis of (ethoxycarbonyl)difluoromethyl thioethers is described. Benzyl, allyl, alkyl halides or diazonium salts as the starting materials together with thiocyanate sodium and TMS-CF2CO2Et in the presence of CsF or NaOAc afford a variety of the fluoroalkylthiolated products in moderate to good yields.
描述了一种用于合成(乙氧基羰基)二氟甲基硫醚的有效的一锅级联方法。在CsF或NaOAc的存在下,以苄基,烯丙基,烷基卤化物或重氮盐为起始原料,与硫氰酸钠和TMS-CF 2 CO 2 Et一起,以中等至良好的收率提供了多种氟代烷基硫代产物。
Copper-catalyzed cyanothiolation to incorporate a sulfur-substituted quaternary carbon center
thiocyanates to generate α-arylthioalkanenitriles bearing sulfur-substituted quaternarycarboncenter atoms has been described. This novel protocol involves the procedure of copper carbene species promoting S–CN bond cleavage and C–CN/C–S bond reconstruction to introduce both sulfur and cyano groups onto a single carboncenter. This cyanothiolation reaction will greatly enhance the synthetic utility of