Journal
CHEMICAL COMMUNICATIONS
Volume 54, Issue 60, Pages 8343-8346Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc03760d
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Herein we describe a robust and practical method to prepare enantiomerically enriched trisubstituted allenes using alkyl Grignard reagents and bench stable propargylic ammonium salts. Excellent yields as well as regio- and stereoselectivities are observed. Our conditions provide a solution to the allene racemization, which has been a long-standing problem when using Grignard reagents.
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