A domino annulation approach to 3,4-diacylpyrrolo[1,2-<i>a</i>]pyrazines: decoration of pyrazine units
作者:Anuradha Dagar、Yohan Seo、Wan Namkung、Ikyon Kim
DOI:10.1039/d0ob00444h
日期:——
A new one-pot, sequential three-component access to 3,4-diacylpyrrolo[1,2-a]pyrazine was achieved from the reaction of an α-haloketone, azide, and N-substituted pyrrole-2-carboxaldehyde under mild reaction conditions, through which a polysubstitution pattern on the pyrazine moiety of the scaffold was realized. The formation of multiple bonds (one C-C and two C-N) was enabled by this domino process
在温和的反应下,α-卤代酮,叠氮化物和N-取代的吡咯-2-羧醛的反应可实现一种新的一锅,顺序的三组分顺序连接到3,4-二酰基吡咯并[1,2-a]吡嗪在这种条件下,可以实现在支架的吡嗪部分上的多取代模式。通过这种多米诺骨牌过程可以形成多个键(一个CC和两个CN),包括原位生成α-亚氨基酮,分子间曼尼希反应,分子内亚胺形成和芳构化。还证明了相关的3,4-二酰基吡嗪并[1,2-a]吲哚的构建以及通过合成精制所得产物进一步扩大该化学空间。