SCHEDULED MAINTENANCE
Asymmetric induction in the Michael reaction has been achieved using alkaloidonium salts in a two-phase system with optical yields of up to 36 and 26% in the addition to αβ-unsaturated ketones of thiols and nitroalkanes respectively. The presence of a hydroxy-group β to the 'onium function is essential to achieve substantial asymmetric syntheses.
S. Colonna, A. Re and H. Wynberg, J. Chem. Soc., Perkin Trans. 1, 1981, 547 DOI: 10.1039/P19810000547
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