Preparation and characterization of some α,α-disubstituted-α-hydroxythiolesters
作者:Wilma E. Elias
DOI:10.1139/v70-614
日期:1970.12.1
A series of α,α-disubstituted-α-hydroxythiolesters has been prepared from ketone cyanohydrins by the Pinner reaction. The esters have been characterized both by classical methods and by analysis of...
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。
Versatile Biocatalytic C(<i>sp</i><sup>3</sup>)−H Oxyfunctionalization for the Site‐ Selective and Stereodivergent Synthesis of α‐ and β‐Hydroxy Acids
α-ketoglutarate-dependent aryloxyalkanoate dioxygenases (AADs) are repurposed for applications in biocatalytic oxyfunctionalization. Activity profiling of natural AADs enabled the synthesis of four types of α-and β-hydroxy acids with broad scope, high efficiency, and good selectivity.