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Synthesis of optically active diols using an efficient polymer bound cinchona alkaloid derivative

โœ Scribed by Antonella Petri; Dario Pini; Silvia Rapaccini; Piero Salvadori


Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
404 KB
Volume
7
Category
Article
ISSN
0899-0042

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โœฆ Synopsis


A new insoluble polymer containing a Cinchona alkaloid derivative has been synthesized and used as chiral ligand in the heterogeneous enantioselective dihydroxylation of olefins. It is shown that the enantioselectivity of the optically active diols obtained from both aliphatic and aromatic substrates is always comparable to that observed in the homogeneous phase under the same reaction conditions. A method for evaluating the enantiomeric excesses of the optically active products is also described.


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Asymmetric Synthesis of Fluorinated Flav
โœ Hai-Feng Wang; Hai-Feng Cui; Zhuo Chai; Peng Li; Chang-Wu Zheng; Ying-Quan Yang; ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 290 KB ๐Ÿ‘ 1 views

Supporting information for this article is available on the WWW under http://dx.doi.org/10.1002/chem.200902303. Scheme 1. Organocatalyzed tandem intramolecular oxa-Michael addition/ electrophilic fluorination reaction to access chiral fluorinated flavanones.