Trifluoromethyl ethers R-OCF3 are easily synthesized from the corresponding dithiocarbonates R-OCS2Me (R = aryl or primary alkyl) by a reagent system consisting of 70% HF/pyridine and an N-halo imide. When the reaction is applied to R-OCS2Me wherein R = secondary alkyl, tertiary alkyl, or benzylic group, fluorination leading to the corresponding alkyl fluorides R-F is achieved, whereas a combination
Radical Deoxygenation of Alcohols<i>via</i>Their<i>S</i>-Methyl Dithiocarbonate Derivatives with Di-<i>n</i>-butylphosphine Oxide as Hydrogen Atom Donor
作者:Doo Ok Jang、Dae Hyan Cho、Derek H. R. Barton
DOI:10.1055/s-1998-1582
日期:1998.1
Various S-methyl dithiocarbonates of tertiary and secondary alcohols are readily deoxygenated in high isolated yields by radical deoxygenation with di-n-butylphosphine oxide and various radical initiators in boiling dioxane. Primary alcohols react similarly in boiling xylenes.
Safe, facile radical-based reduction and hydrosilylation reactions in a microreactor using tris(trimethylsilyl)silane
作者:Arjan Odedra、Karolin Geyer、Tomas Gustafsson、Ryan Gilmour、Peter H. Seeberger
DOI:10.1039/b803715a
日期:——
A highly efficient system for tris(trimethylsilyl)silane (TTMSS) mediated deoxygenation, dehalogenation and hydrosilylation reactions is described in a microstructured device; this convenient platform enables the scale up of radical-based processes.