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Kinetics of Rh(II)-Catalyzed α-Diazo-β-ketoester Decomposition and Application to the [3+6+3+6] Synthesis of Macrocycles on Large Scale and Low Catalyst Loadings

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Published in ACS Catalysis. 2016, vol. 6, p. 4877-4881
Abstract In the context of [3+6+3+6] macrocyclization reactions, precise kinetics of α-diazo-β-ketoester decomposition were measured by in situ infrared (IR) monitoring. Dirhodium complexes of Ikegami–Hashimoto type—and perchlorinated phthalimido derivatives in particular—performed better than classical achiral complexes. Clear correlations were found between speciation among dirhodium species and catalytic activity. With these results, novel cyclohexyl-derived catalysts were developed, affording good yields of macrocycles (up to 78%), at low catalyst loadings (from 0.01 mol % to 0.001 mol %) and on a large scale (from 1 g to 20 g).
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Research groups Groupe Lacour
Groupe Piguet
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POGGIALI, Daniele et al. Kinetics of Rh(II)-Catalyzed α-Diazo-β-ketoester Decomposition and Application to the [3+6+3+6] Synthesis of Macrocycles on Large Scale and Low Catalyst Loadings. In: ACS Catalysis, 2016, vol. 6, p. 4877-4881. https://archive-ouverte.unige.ch/unige:85077

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Deposited on : 2016-07-06

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