Two-Step Synthesis of 3,4-Dihydropyrrolopyrazinones from Ketones and Piperazin-2-ones
作者:Cosme Sandoval、Ngiap-Kie Lim、Haiming Zhang
DOI:10.1021/acs.orglett.8b00197
日期:2018.2.16
An expedient two-step synthesis of 3,4-dihydropyrrolopyrazinones has been achieved via a Vilsmeier–Haack reaction of ketones, followed by an annulation of the corresponding chloroaldehydes with commercially available piperazin-2-ones. A variety of cyclic and acyclic ketones and piperazin-2-ones participated in this two-step chemistry, affording the desired 3,4-dihydropyrrolopyrazinones in up to 78%
通过酮的Vilsmeier-Haack反应,然后将相应的氯醛与市售的哌嗪-2-酮环合,已实现了3,4-二氢吡咯并吡嗪并酮的便捷两步合成。多种环状和无环酮以及哌嗪-2-酮参与了该两步化学反应,从而以高达78%的收率提供了所需的3,4-二氢吡咯并吡嗪酮。