Electrochemical and direct C–H methylthiolation of electron-rich aromatics
作者:Yaxing Wu、Hongliang Ding、Ming Zhao、Zhong-Hai Ni、Jing-Pei Cao
DOI:10.1039/d0gc00591f
日期:——
The electrochemical-induced C–H methylthiolation of electron-rich aromatics has been accomplished via a three component cross-coupling strategy. Potassium thiocyanate (KSCN) as both the supporting electrolyte and sulfur source and methanol as the methylation reagent are used. This protocol is versatile for various (hetero)aromaticcompounds such as aniline, anisole and indole. The reaction proceeds
DMSO/iodine-catalyzed oxidative C–Se/C–S bond formation: a regioselective synthesis of unsymmetrical chalcogenides with nitrogen- or oxygen-containing arenes
作者:Sumbal Saba、Jamal Rafique、Antonio L. Braga
DOI:10.1039/c5cy01503k
日期:——
greener protocol to access different types of unsymmetrical chalcogenides with nitrogen- or oxygen-containing arenes through oxidative C–Se/C–S formation via direct C(sp2)–H bond activation was developed. The products were obtained in good to excellent yields using [O or N]-containing arenes, half equiv. of various odorless diorganyl dichalcogenides (S/Se), iodine (20 mol%) as the catalyst and 3 equiv
yields with high regioselectivity from readily available aromatic compounds and aryl/alkyl thiols, even on gramscale. To demonstrate the practicability of this reaction, two bioactive compound skeletons were synthesized in good yields. This method can also be used to late‐stage modification of curcumin.