developed for the efficient synthesis of benzylidene acetal from aldehyde at room temperature. In this metal‐free method, Cl3CCN serves as a water scavenger as well as reaction medium and the acid catalyst is readily recovered and recycled. At room temperature, a wide variety of aryl and α,β‐unsaturated aldehydes react readily with functionalized diols and opticallyactive diols to furnish the corresponding
New Access to 1-Deoxynojirimycin Derivatives via Azide−Alkene Cycloaddition
作者:Ying Zhou、Paul V. Murphy
DOI:10.1021/ol8014495
日期:2008.9.1
The synthesis of 1-deoxynojirimycin (DNJ) derivatives is described from D-glucono-delta-lactone. The DNJ derivatives were obtained via a sequence that included a stereoselective intramolecular Huisgen reaction, decomposition to an aziridine, and its subsequent reaction with a nucleophile. Minimization of allylic strain in the transition state accounts for the stereoselectivity of the cycloaddition reaction.
A chemoselective oxidation of monosubstituted ethylene glycol: facile synthesis of optically active α-hydroxy acids
作者:Kiran Chinthapally、Sundarababu Baskaran
DOI:10.1039/c4ob00601a
日期:——
A mild and efficient method for the synthesis of optically active α-hydroxy acids through chemoselective oxidation of monosubstitutedethylene glycols using the TEMPO–NaOCl reagent system is described. It is evident from our studies that the solvent, pH and reaction temperature are very crucial for the success of this oxidation. The versatility of this method has been demonstrated with a variety of
Building blocks from monosaccharides for synthesis of scaffolds, including macrocycles. Application of allylic azide rearrangement, azide-alkyne cycloaddition and ring closing metathesis
作者:Karen A. Fox、Rekha Chadda、Francisco Cardona、Stephen Barron、Patrick McArdle、Paul V. Murphy
DOI:10.1016/j.tet.2020.131495
日期:2020.11
Synthesis of compounds with characteristics of natural products are required to increase the diversity and biological relevance of compounds for screening. These include new frameworks/scaffolds, with multiple stereogenic centres and various functional groups. Carbohydrates are renewable, readily available and have stereochemical diversity and functionality. Herein, building blocks derived from monosaccharides