Abstract:High oxidation‐state carbonyl coupling partners including esters and lactones were reacted with enones to give aldol‐type products directly using two‐fold organoborane catalysis. This new retrosynthetic disconnection to aldol‐type products is compatible with enolisable coupling partners, without self‐condensation, and couples the high reactivity of secondary dialkylboranes with the stability of pinacolboronic esters. Excellent chemoselectivity, substrate scope (including those containing reducible functionalit… Show more
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