Asymmetric Synthesis of Protected α-Alkyl-β-amino-δ-hydroxy Esters by Stereocontrolled Elaboration of THYM*.
ChemInform(2010)
摘要
Abstract Highly diastereoselective internal Michael addition of the carbamate moiety of enoate 1b [derived from asymmetrized tris(hydroxymethyl)methane (THYM*)] leads to oxazinone 4, which can, in turn, be alkylated with moderate to good diastereoselectivity in the position α to the ester moiety to give protected anti,anti α-alkyl-β-amino-δ-hydroxy esters.
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