Add time:08/27/2019         Source:sciencedirect.com

Allyloxy-N-(1-benzyl) cinchonidinium bromide was found to be an effective organocatalyst for asymmetric Michael reactions of thiols with various α,β-unsaturated ketones, acids and esters to provide optically active sulphides with high enantiomeric excess (91–100% ee) and chemical yields (up to >98%). The reaction was performed with 2–8 mol % of catalyst in water at room temperature using tetra-n-butyl ammonium fluoride as an additive.

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