13C NMR as a general tool for the assignment of absolute configuration
作者:Iria Louzao、José Manuel Seco、Emilio Quiñoá、Ricardo Riguera
DOI:10.1039/c0cc02774j
日期:——
(13)C NMR, alone or in combination with (1)H NMR, allows the assignment of the absolute configuration of chiral alcohols, amines, carboxylic acids, thiols, cyanohydrins, sec,sec-diols and sec,sec-aminoalcohols, derivatized with appropriate chiral auxiliaries. This extends the assignment possibilities of NMR to fully deuterated and to nonproton containing compounds.
Absolute Configuration of Ketone Cyanohydrins by <sup>1</sup>H NMR: The Special Case of Polar Substituted Tertiary Alcohols
作者:Iria Louzao、Rosa García、José Manuel Seco、Ricardo Riguera
DOI:10.1021/ol8023314
日期:2009.1.1
The absolute configuration of ketone cyanohydrins can be assigned from analysis of the 1H NMR spectra of the corresponding (R)- and (S)-MPA ester derivatives and use of ΔδRS signs. This is an application of the NMR methodology for stereochemical assignment to tertiary alcohols possessing polar groups as substituents.
酮氰醇的绝对构型可以从分析被分配1个相应的(的1 H NMR谱- [R和( - )小号)-MPA酯衍生物和使用Δδ RS迹象。这是NMR方法在立体化学上分配给具有极性基团作为取代基的叔醇的应用。