Abstract
Asymmetric allylboration of aldehydes with allylboronic acid pinacol ester catalyzed by chiral hydroxyl carboxylic acid is described. This reaction provides synthetically useful homoallyl alcohols in high yield with good to high enantioselectivity. The present catalytic protocol was also examined in asymmetric allenylboration of aldehydes at elevated temperature to afford chiral homopropargyl alcohols with reasonable asymmetric induction.
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