Abstract

AbstractInspired by polyketide biosynthesis, unprecedented metal‐catalysed Doebner–Knoevenagel condensations between Malonic Acid Half Thioesters (MAHTs) and various aldehydes have been achieved through the use of Yb(OTf)3 as catalyst, mimicking a five‐domain polyketide synthase module for the first time. In the presence of 5‐methoxybenzimidazole, stereo‐ and regiocontrol of the reaction proved to be high. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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