Enantioselective syntheses of α-methylene butyrolactones via asymmetric aminocarbonylation of tungsten–prop-2-ynyl compounds

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Lin Hung Shiu, Sue-Lein Wang, Rai-Shung Liu and Ming-Jung Wu


Abstract

A tungsten–η1-vinylprop-2-ynyl compound undergoes enantioselective aminocarbonylation to afford an optically pure tungsten–π-γ-lactone; this π-allyl complex is useful for the efficient synthesis of optically pure α-methylene butyrolactone.


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