Abstract
An oxazaborolidine derived from N-tosyl (αS,βR)-β-methyltryptophan ( 1)catalyzes the Diels-Alder reaction of 2-bromoacrolein and furan with 96:4 enantioselectivity, leading to an efficient synthesis of numerous chiral 7-oxabicyclo[2.2.1]heptene derivatives.
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