The Phenylsulfonyl Group as a Temporal Regiochemical Controller in the Catalytic Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylides
作者:Ana López-Pérez、Javier Adrio、Juan C. Carretero
DOI:10.1002/anie.200805063
日期:2009.1.2
good regioselectivity and high exo selectivity and enantioselectivity (see scheme). The products are precursors to substituted pyrrolidines and pyrrolines that are not attainable by direct 1,3‐dipolar cycloadditions with typical acrylates.
控制区域选择性:苯基磺酰基控制标题反应中的区域选择性,从而提供吡咯烷-2,3-二羧酸酯,具有良好的区域选择性,高的外向 选择性和对映选择性(参见方案)。该产品是取代的吡咯烷和吡咯啉的前体,而通常的丙烯酸酯无法通过直接1,3-偶极环加成反应获得。