Palladium-Mediated Annulation of Vinyl Aziridines with Michael Acceptors: Stereocontrolled Synthesis of Substituted Pyrrolidines and Its Application in a Formal Synthesis of (−)-α-Kainic Acid
作者:Martin A. Lowe、Mehrnoosh Ostovar、Serena Ferrini、C. Chun Chen、Paul G. Lawrence、Francesco Fontana、Andrew A. Calabrese、Varinder K. Aggarwal
DOI:10.1002/anie.201101389
日期:2011.7.4
Just add salt: Vinyl aziridines have been treated with methyl vinyl ketone or ethyl thioacrylate in the presence of Pd0 to give pyrrolidines with moderate to good diastereoselectivity. The presence of nBu4NCl was critical to successful annulation. The synthetic utility of the methodology has been demonstrated in a short (formal) synthesis of (−)‐α‐kainic acid.
只需添加盐即可:在Pd 0的存在下,将乙烯基氮丙啶用甲基乙烯基酮或硫代丙烯酸乙酯处理,得到具有中等至良好非对映选择性的吡咯烷。n Bu 4 NCl的存在对于成功的环化至关重要。该方法的综合效用已在(-)-α-海藻酸的简短(正式)合成中得到了证明。