Chemoselective Reductive Nucleophilic Addition to Tertiary Amides, Secondary Amides, and<i>N</i>-Methoxyamides
作者:Minami Nakajima、Yukiko Oda、Takamasa Wada、Ryo Minamikawa、Kenji Shirokane、Takaaki Sato、Noritaka Chida
DOI:10.1002/chem.201404648
日期:2014.12.22
modern organic synthesis, chemoselectivity is recognized as an important factor in the development of new methodologies. Chemoselective nucleophilic addition to amide carbonyl centers is a challenge because classical methods require harsh reaction conditions to overcome the poor electrophilicity of the amide carbonyl group. We have successfully developed a reductive nucleophilic addition of mild nucleophiles
随着目标分子在现代有机合成中的复杂性增加,化学选择性被认为是开发新方法的重要因素。酰胺羰基中心的化学选择性亲核加成是一个挑战,因为经典方法需要苛刻的反应条件以克服酰胺羰基的不良亲电性。我们已经成功开发出使用Schwartz试剂将温和的亲核试剂还原性添加到叔酰胺,仲酰胺和N-甲氧基酰胺上的亲核试剂[Cp 2ZrHCl]。该反应在各种敏感的官能团,例如甲酯的存在下,以高度化学选择性的方式发生,这些官能团通常需要在亲核加成之前进行保护。该反应将适用于由容易获得的酰胺基团简单合成复杂的天然生物碱。