P.M.R. Spectroscopy of Trimethylsilyl Derivatives of Hydroxy Acids
作者:Guy Gordon Studdy Dutton、Norman Funnell、Kelly Blair Gibney
DOI:10.1139/v72-616
日期:1972.12.1
P.m.r. spectroscopy at 60 MHz of trimethylsilyl ethers and esters, prepared from hydroxyacids, gives well resolved sharp singlets in the range τ 9.8–9.9, These signals may be used to determine the ratio of hydroxyl to carboxyl groups in a molecule. Measurements may be made directly on fractions isolated by gas–liquid chromatography. The influence of the solvent on the resolution is demonstrated.
Synthesis of trimethylsilyl carboxylates by HMDS under solvent-free conditions
作者:Marjan Jereb、Janja Lakner
DOI:10.1016/j.tet.2016.08.003
日期:2016.9
carboxylic acids were transformed into their trimethylsilyl esters with HMDS in a practically completely solvent-free process, while a catalytic amount of iodine was required in some cases. The process has several advantages over the known methods: untreated reactants, air atmosphere, mild and neutral conditions, no evolution of hydrogen halide, no need of an additional base, low amount of waste, completely