Remote stereocontrol using rotationally restricted amides: (1,5)-asymmetric induction
作者:Jonathan Clayden、Megan Darbyshire、Jennifer H. Pink、Neil Westlund、Francis X. Wilson
DOI:10.1016/s0040-4039(97)10289-1
日期:1997.12
The stereochemical influence of a rotationally restricted amide group extends widely across substituted aromatic amides. Stereogenic centres can be created with high levels of (1,5)-stereocontrol when electrophiles are added to the enolates of 2-ketonaphthamides or to lithiated 2-alkylnaphthamides. Sequential double lateral lithiation of 2,6-dialkylbenzamides can lead to compounds containing (1,5)
旋转受限的酰胺基团的立体化学影响广泛地跨越了取代的芳族酰胺。当将亲电试剂添加到2-酮萘乙酰胺的烯酸酯或锂化的2-烷基萘酰胺的亲电子试剂中时,可以形成具有高水平(1,5)-立体控制的立体异构中心。2,6-二烷基苯甲酰胺的顺序双侧锂化可通过双向不对称诱导过程导致包含(1,5)相关立体异构中心的化合物。