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Sugar thiourea catalyzed highly enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinone to β-nitroalkenes

✍ Scribed by Reddy, B. V. Subba ;Reddy, S. Madhusudana ;Swain, Manisha

Book ID: 120381015
Publisher: The Royal Society of Chemistry
Year: 2013
Tongue: English
Weight: 400 KB
Volume: 3
Category: Article
ISSN: 2046-2069
DOI: 10.1039/c2ra22270a

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## Abstract An organocatalytic enantioselective Michael addition of 2‐hydroxy‐1,4‐naphthoquinone to β,γ‐unsaturated α‐oxo esters has been developed. The process was promoted by bifunctional chiral amine derived squaramides according to a hydrogen‐bonding mediated activation mechanism and afforded t