Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 15, Pages 5528-5532Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo900823h
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- NSF [CHE-0615604]
- NIH [GM35956]
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The stereochemistry of the Kulinkovich cyclopropanation of nitriles with alkenes has been examined by employing (E)-disubstituted alkenes and deuterium-labeled homoallylic alcohols as a stereochemical probe. An intramolecular cyclopropa nation proceeds with preservation of the olefin configuration. On the other hand, intermolecular counterparts occur with both preservation and reversal of the olefin configuration, which corresponds to retention and inversion of configuration at the Ti-C bond, respectively, in the cyclopropane-forming step. These uncommon stereochemical outcomes contrast with that of the Kulinkovich cyclopropanation of tertiary amides.
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