| Literature DB >> 19256562 |
Andrew T Parsons1, Jeffrey S Johnson.
Abstract
A highly diastereoselective dynamic kinetic asymmetric transformation of racemic 1,1-cyclopropane diesters to prepare enantioenriched tetrahydrofuran (THF) derivatives has been developed. Asymmetric [3 + 2] cycloaddition of activated donor-acceptor (D-A) cyclopropanes and aldehydes catalyzed by ((t)Bu-pybox)MgI(2) gives THF products in good to excellent yields (48-92%) as single diastereomers with er's up to 97:3. Aryl, cinnamyl, and aliphatic aldehydes are competent dipolarophiles for this transformation.Entities:
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Year: 2009 PMID: 19256562 DOI: 10.1021/ja809873u
Source DB: PubMed Journal: J Am Chem Soc ISSN: 0002-7863 Impact factor: 15.419