作者:Yang Liu、Zhongyi Mao、Alexandre Pradal、Pei-Qiang Huang、Julie Oble、Giovanni Poli
DOI:10.1021/acs.orglett.8b01616
日期:2018.7.6
The synthesis of bi- and tricyclic structures incorporating pyrrolidone rings is disclosed, starting from resonance-stabilized acetamides and cyclic α,β-unsaturated-γ-oxycarbonyl derivatives. This process involves an intermolecular Tsuji–Trost allylation/intramolecular nitrogen 1,4-addition sequence. Crucial for the success of this bis-nucleophile/bis-electrophile [3 + 2] annulation is its well-defined
从共振稳定的乙酰胺和环状α,β-不饱和-γ-氧羰基衍生物开始,公开了掺入吡咯烷酮环的双环和三环结构的合成。该过程涉及分子间的Tsuji-Trost烯丙基化/分子内的氮1,4-加成序列。这种双亲核试剂/双亲电子试剂[3 + 2]的成功成功的关键是其明确定义的步骤时间顺序以及前一步的总化学选择性。当新形成的环状产物在氮取代基上带有适当定位的邻卤代芳基部分时,另一分子内的酮基α-芳基化反应可加入级联反应,从而在同一合成操作中形成两个新的环和三个新的键。