Erbium(III) triflate is a powerfulcatalyst for the acylation of alcohols and phenols. The reaction works well for a large variety of simple and functionalized substrates by using different kinds of acidicanhydrides Ac2O, (EtCO)2O, [(CH3)3CO]2O, Bz2O, and (CF3CO)2O} without isomerisation of chiral centres. Moreover, the catalyst can be easily recycled and reused without significant loss of activity
A new catalytic approach to selective functionalization of the strong C−F bonds in polyfluorinated aliphatic esters and amides is reported, affording a diverse array of important partially fluorinated motifs through hydrodefluorination, defluoroalkylation, and defluoroalkenylation. Straightforward downstream chemistry towards fluorinated alcohols, amines and drug derivatives highlights the potential
We herein reported an electrochemical selective (deutero)hydrodefluorination reaction of trifluoroacetamides. The reaction which exhibits a remarkable chemoselectivity control and delivers (deuterium-labeled) CF2H- and CFH2-products in good yields with high level of deuterium incorporation, respectively, is enabled by the addition of different organoboron sources and (deuterated)water as the deuterium
Characterization of Functional Groups by Nuclear Magnetic Resonance. I. Classification of Alcohols from the Fluorine-19 Spectra of Trifluoroacetates<sup>1</sup>
作者:Stanley L. Manatt
DOI:10.1021/ja00958a046
日期:1966.3
Fluorine-19 nuclear magnetic resonance spectroscopy of sterol and bile acid trifluoroacetates