Enantioselective protonation and alkylation of non-covalent mixed aggregates of chiral 3-aminopyrrolidine lithium amides
作者:Karine Flinois、Yi Yuan、Christophe Bastide、Anne Harrison-Marchand、Jacques Maddaluno
DOI:10.1016/s0040-4020(02)00377-0
日期:2002.6
a temporary basis, a chiral moiety to a reagent. Attempts to take advantage of this phenomenon with chiral 3-aminopyrrolidine (3-AP) lithium amides are described. The enantioselective protonation of a complex involving these amides and the lithium enolate of 2-methyltetralone by an achiral proton source gives products in which the ee does not exceed 40%. The same class of chiral amides is then applied
高极性实体的非共价聚集体会暂时将手性部分组装到试剂上。描述了尝试利用手性3-氨基吡咯烷(3-AP)氨基酰胺利用这种现象。通过非手性质子源对涉及这些酰胺和2-甲基四氢萘酮的烯醇锂的复合物的对映体选择性质子化,其ee值不超过40%。然后使用烷基锂和苯基锂将相同种类的手性酰胺应用于醛的不对称亲核烷基化。在这种情况下,由酰胺化锂和烷基锂组成的混合聚集体似乎直接参与了反应,该结构先前已在类似情况下进行了详细描述。因此,可以获得更高的不对称感应,