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Chemoenzymatic synthesis of enantiomerically enriched 2-oxobicyclo[m.1.0]alkan-3-yl acetate derivatives
Date
2006-01-23
Author
ÖZDEMİRHAN, FAZİLET DEVRİM
ÇELİK, MURAT
ATLI, SELİN
Tanyeli, Cihangir
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Racemic alpha'-acetoxy alpha,beta-unsaturated cyclopentanone and cyclohexanone have been resolved into the corresponding enantiomerically enriched alpha'-hydroxylated and acetoxylated compounds with 96-97% ee via PLE hydrolysis. Stereoselectivity in the palladium(II)-catalyzed reaction between the enantiomerically enriched alpha'-acetoxylated compounds and diazomethane has been investigated. In the alpha'-acetoxylated cyclopentenone, preferential cyclopropanation occurs in the anti-form, whereas alpha'-acetoxylated cyclohexenone affords both syn- and anti-products (syn:anti, 61:36%). The relative configuration of the products was determined by NOE experiments.
Subject Keywords
Physical and Theoretical Chemistry
,
Inorganic Chemistry
,
Organic Chemistry
,
Catalysis
URI
https://hdl.handle.net/11511/40329
Journal
TETRAHEDRON-ASYMMETRY
DOI
https://doi.org/10.1016/j.tetasy.2006.01.004
Collections
Department of Chemistry, Article