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An, Feng; Jangra, Harish; Wei, Yin; Shi, Min; Zipse, Hendrik und Ofial, Armin R. ORCID logoORCID: https://orcid.org/0000-0002-9600-2793 (21. Februar 2022): Reactivities of allenic and olefinic Michael acceptors towards phosphines. In: Chemical Communications, Bd. 58, Nr. 20: S. 3358-3361 [PDF, 3MB]

Abstract

The kinetics of the reactions of tributylphosphine with allenic and olefinic Michael acceptors in dichloromethane at 20 °C was followed by photometric and NMR spectroscopic methods. Combination with DFT-calculated methyl anion affinities revealed the relevance of retroaddition barriers in phosphine-catalysed reactions when mixtures of allenic and olefinic substrates are used.

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