Enantioselective Synthesis of Trifluoromethylated Tertiary Thioethers through Organocatalytic Sulfa-Michael Addition of Thiols to β-Trifluoromethyl β,β-Disubstituted Enones

Abstract

An organocatalytic asymmetric sulfa-Michael addition of thiols to β-trifluoromethyl β,β-disubstituted (E)-enones in the presence of 10 mol% of a cinchona alkaloid-derived thiourea catalyst provides direct and simple access to chiral trifluoromethyl tertiary thioethers in high yields and up to 76% ee.

Key words

asymmetric catalysis - enones - Michael additions - organocatalysis - thiols - sulfides

• References

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All catalysts used in this study were identical with those in ref. 6c; see also:
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