Abstract
Thioesters undergo soft enolization and direct Mannich additionto sulfonylimines on treatment with magnesium bromide ethyl etherateand N, N-diisopropylethylamine.The reactions proceed readily with a range of sulfonylimines and,in the case of 2,4,6-triisopropylphenyl thiopropionate, give moderateto good SYN dia-stereoselectivity.
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