Phosphine-Catalyzed Asymmetric Allylic Alkylation of Achiral MBH Carbonates with 3,3′-Bisindolines: Enantioselective Construction of Quaternary Stereogenic Centers
Chuan Xiang Alvin Tan, Guang‐Jian Mei, Yixin Lü
Abstract
The asymmetric allylic alkylation (AAA) of achiral Morita-Baylis-Hillman (MBH) carbonates with 3,3'-bisindolines under the catalysis of amino-acid-derived bifunctional phosphines was accomplished. With the AAA approach introduced herein, challenging 3,3'-bisindolines bearing an all-carbon quaternary stereocenter (C3a) have been constructed in good yields with good to excellent enantioselectivties. In addition, the synthetic value of this protocol was demonstrated by the facile synthesis of the core skeleton of gliocladin C.
Topics & Concepts
StereocenterTsuji–Trost reactionEnantioselective synthesisChemistryPhosphineBifunctionalAllylic rearrangementCatalysisAlkylationStereochemistryOrganic chemistryCombinatorial chemistryAsymmetric Synthesis and CatalysisSynthetic Organic Chemistry MethodsAxial and Atropisomeric Chirality Synthesis