A Stereoselective Approach to Functionalized Cyclohexenones

Autor: Stefan Bräse, Anne C. Meister, Paul F. Sauter
Rok vydání: 2013
Předmět:
Zdroj: European Journal of Organic Chemistry. 2013:7110-7116
ISSN: 1434-193X
DOI: 10.1002/ejoc.201300752
Popis: A catalytic enantioselective approach to 4-hydroxy-6-methylcyclohex-2-enones is presented herein. The stereogenic information is generated through a copper-catalyzed 1,4-addition to p-benzoquinone monoketal using a chiral, BINOL-based (BINOL = 1,1′-bi-2-naphthol) phosphane ligand, according to the procedure of Feringa et al. A CBS (Corey–Bakshi–Shibata) reduction of the 1,4-adducts gave the four possible isomers in two steps and 82–97 % ee (enantiomeric excess), starting from commercially available 4,4-dimethoxycyclohexa-2,5-dien-1-one (7).
Databáze: OpenAIRE
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