Selective Isomerization via Transient Thermodynamic Control: Dynamic Epimerization of <i>trans</i> to <i>cis</i> Diols
作者:Christian J. Oswood、David W. C. MacMillan
DOI:10.1021/jacs.1c11552
日期:2022.1.12
Traditional approaches to stereoselective synthesis require high levels of enantio- and diastereocontrol in every step that forms a new stereocenter. Here, we report an alternative approach, in which the stereochemistry of organic substrates is selectively edited without further structural modification, a strategy with the potential to allow new classes of late-stage stereochemical manipulation and
Borinic Acid-Catalyzed Regioselective Acylation of Carbohydrate Derivatives
作者:Doris Lee、Mark S. Taylor
DOI:10.1021/ja110332r
日期:2011.3.23
Reversible covalent interactions of organoboron compounds are exploited as the basis for regioselective borinic acid-catalyzed acylations of polyols. This catalytic protocol enables differentiation of the secondary OH groups of a wide range of carbohydrate derivatives with diverse acid chloride and chloroformate reagents, using a structurally simple diarylborinic acid-derived catalyst.