76549-03-6Relevant articles and documents
Chemistry of Enoxysilacyclobutanes. 3. Uncatalyzed, Syn-Selective, Asymmetric Aldol Additions
Denmark, Scott E.,Griedel, Brian D.
, p. 5136 - 5138 (1994)
Asymmetrically modified S,O-(alkoxysilacyclobutyl)ketene acetals derived from methane thiol esters reacted with aromatic aldehydes at low temperature to afford, after desilylation, the corresponding β-hydroxythiol ester aldolates in high enantiomeric excess (91-94percent ee).
Fe-Catalyzed Anaerobic Mukaiyama-Type Hydration of Alkenes using Nitroarenes
Bhunia, Anup,Bergander, Klaus,Daniliuc, Constantin Gabriel,Studer, Armido
supporting information, p. 8313 - 8320 (2021/03/08)
Hydration of alkenes using first row transition metals (Fe, Co, Mn) under oxygen atmosphere (Mukaiyama-type hydration) is highly practical for alkene functionalization in complex synthesis. Different hydration protocols have been developed, however, control of the stereoselectivity remains a challenge. Herein, highly diastereoselective Fe-catalyzed anaerobic Markovnikov-selective hydration of alkenes using nitroarenes as oxygenation reagents is reported. The nitro moiety is not well explored in radical chemistry and nitroarenes are known to suppress free radical processes. Our findings show the potential of cheap nitroarenes as oxygen donors in radical transformations. Secondary and tertiary alcohols were prepared with excellent Markovnikov-selectivity. The method features large functional group tolerance and is also applicable for late-stage chemical functionalization. The anaerobic protocol outperforms existing hydration methodology in terms of reaction efficiency and selectivity.
Synthesis of γ-Lactones via the kowalski homologation reaction: Protecting-group-free divergent total syntheses of eupomatilones-2,5,6, and 3- epi-eupomatilone-6
Choi, Hosam,Jang, Hanho,Kim, Hyoungsu,Lee, Kiyoun
, p. 7857 - 7862 (2019/10/11)
A highly efficient synthesis of functionalized chiral γ-butyrolactone scaffolds has been described. The basis of the approach is the Kowalski ester homologation that is modified for our proposed transformation. The newly developed methodology combines a d