Useful Applications of Enantioselective (4 + 2)-Cycloaddition Reactions to the Synthesis of Chiral 1,2-Amino Alcohols, 1,2-Diamines, and β-Amino Acids
作者:Karla Mahender Reddy、Barla Thirupathi、E. J. Corey
DOI:10.1021/acs.orglett.7b02437
日期:2017.9.15
The scope of enantioselective (4 + 2)-cycloaddition reactions has been expanded to include reactive olefinic components that are equivalents of three inoperable and unstable ethylene derivatives: 1-hydroxy-2-aminoethylene, 1,2-diaminoethylene, and β-aminoacrylic acid. In this way, a variety of otherwise unavailable functionalized (4 + 2)-cycloadducts have been synthesized from 1,3-dienes with high
对映选择性(4 + 2)-环加成反应的范围已扩大到包括反应性烯烃组分,相当于三个不可操作且不稳定的乙烯衍生物:1-羟基-2-氨基乙烯,1,2-二氨基乙烯和β-氨基丙烯酸。通过这种方法,已经从1,3-二烯以高对映选择性(92-98%)和高收率合成了许多其他不可用的官能化(4 + 2)-环加合物。导致这种合成进展的研究还对催化对映选择性(4 + 2)-环加成中的反应性和位置选择性产生了令人惊讶的见解。