Catalytic Asymmetric Cycloaddition Reaction of Alkenyl Trichloroacetates with Nitrones
作者:Akira Yanagisawa、Atsuto Izumiseki、Takuya Sugita、Naoyuki Kushihara、Kazuhiro Yoshida
DOI:10.1055/s-0031-1290094
日期:2012.1
(S)-BINOL-derived chiral tindibromide possessing a 4-trifluoromethylphenyl group at 3- and 3′-positions as the chiral precatalyst in the presence of sodium ethoxide, sodium iodide, and ethanol. Optically active isoxazolidines with up to 95% ee were diastereoselectively obtained in high yields even from aliphatic aldehyde derived nitrones under the influence of the in situ generated chiral tin ethoxide iodide