Highly Enantioselective Synthesis of Glycidic Amides Using Camphor-Derived Sulfonium Salts. Mechanism and Applications in Synthesis
作者:Varinder K. Aggarwal、Jonathan P. H. Charmant、Daniel Fuentes、Jeremy N. Harvey、George Hynd、Diasuke Ohara、Willy Picoul、Raphaël Robiette、Catherine Smith、Jean-Luc Vasse、Caroline L. Winn
DOI:10.1021/ja0568345
日期:2006.2.1
amide-stabilized sulfur ylides derived from readily available camphor-derived sulfonium salts for the synthesis of glycidic amides have been studied. Primary, secondary, and tertiary amides were tested, and it was found that the highest enantioselectivities were observed with tertiary amides, which provided glycidic amides in good to excellent yields, exclusive trans selectivity, and excellent enantioselectivities
已经研究了一系列由容易获得的樟脑衍生锍盐衍生的酰胺稳定硫叶立德用于合成缩水甘油酰胺的反应。对伯、仲和叔酰胺进行了测试,发现使用叔酰胺观察到最高的对映选择性,这提供了良好至极好的收率、专属反式选择性和极好的对映选择性的缩水甘油酰胺。该反应对于芳香醛是普遍的,但脂肪醛给出了更多可变的对映选择性。通过用有机锂试剂处理,环氧酰胺可以干净地转化为环氧酮。我们还能够用各种亲核试剂实现环氧酰胺的选择性开环,然后将酰胺水解以产生相应的羧酸。