Diastereoselective Ugi reaction without chiral amines: the synthesis of chiral pyrroloketopiperazines
作者:Valentine G. Nenajdenko、Alexander L. Reznichenko、Elizabeth S. Balenkova
DOI:10.1016/j.tet.2007.01.056
日期:2007.4
The three-component Ugi reaction with chiral 2-(2-formyl-1H-pyrrol-1-yl)acetic acids prepared from natural l-aminoacids was investigated. The reaction opens a new route to chiral substituted pyrroloketopiperazines. One of the first examples of an asymmetric Ugi reaction without chiral amines is described. The reaction proceeds with moderate diastereoselectivity to give the target compounds in good
研究了由天然1-氨基酸制得的手性2-(2-甲酰基-1 H-吡咯-1-基)乙酸与三组分Ugi反应。该反应为手性取代的吡咯并酮哌嗪开辟了一条新途径。描述了没有手性胺的不对称Ugi反应的第一个例子。反应以适度的非对映选择性进行,以高收率得到目标化合物。讨论了该方法的范围和局限性。