Abstract
Diastereoselective aza-Diels–Alder (aza-DA) reactions of an N- tert-butanesulfinyl α-imino ester with different dienes including activated and non-activated dienes in the presence of BF 3·OEt 2 are described. Diastereoselectivities up to 99% were observed for acyclic unactivated dienes. The absolute configurations of two aza-DA products have been solved by X-ray analysis.
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