Stereoselective Synthesis of Trisubstituted Olefins by a Directed Allylic Substitution Strategy
作者:Yvonne Schmidt、Bernhard Breit
DOI:10.1002/chem.201100843
日期:2011.10.10
α‐methylene aldehydes. Addition of an organometallic reagent and introduction of the o‐DPPB group by esterification was followed by the o‐DPPB‐directed copper‐mediated allylic substitution with a Grignard reagent to furnish stereodefined trisubstituted olefins. Additionally, incorporation of a stereocenter from the chiralpool allowed the preparation of an enantiomericallypureolefin that bore three alkyl