generation of the corresponding alpha-substituted vinylogous nitronates and their use in the development of a highly diastereo- and enantioselective aza-Henry reaction with N-Boc aldimines under the catalysis of chiral ammonium betaines. The novel vinylogous nitronates undergo stereoselective bond formation at the sterically encumbered alpha-position exclusively, allowing the construction of contiguous
通过轻松生成相应的α-取代的
乙烯基亚硝酸盐及其在N-Boc Aldimines催化下与N-Boc Aldimines进行高度非对映和对映选择性的aza-Henry反应的开发中,发现了α,β-二取代硝基烯烃的
乙烯基反应性。手性
铵甜菜碱。新型
乙烯基亚硝酸盐仅在空间受阻的α位置经历立体选择键的形成,从而允许构建连续的叔-季位立体碳中心。