AgBF<sub>4</sub> catalyzed regio- and stereoselective synthesis of <i>trans</i> α-vinyl-β-amino esters via asymmetric addition of siyl dienolate to sulfinylimines
<p>AgBF<sub>4</sub> catalyzed Mannich-type reactions of siyl dienolate with chiral aryl-substituted (<i>S</i>)-<i>N</i>-<i>tert</i>-butanesulfinylimines has been developed. A class of chiral <i>trans</i> α-vinyl-β-amino esters was obtained in moderate to excellent yields (up to 93%), good diastereoselectiveties (up to 92:8 dr), and complete α-site regioselectivity.</p
