Abstract

The external chiral ligand-controlled asymmetric Mannich-type reaction of a binary- or ternary-complexed lithium ester enolate of protected glycolates with benzaldehyde imines gave the corresponding 3-trialkylsilyloxy-4-phenylazetidin-2-ones, applicable as a synthetic intermediate of C13 side chain of taxan anticancer drugs, in moderate enantioselectivity.

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