3-dipolar cycloaddition of nitrilimine, generated in situ from (Z)-N-aryl-2-oxopropanehydrazonoyl bromide and Et3N, to 3-arylpyrrolo[ 1,2-a]pyrazine afforded novel 1-(1,5-diaryl-1,10b-dihydropyrrolo[1,2-a][1,2,4]triazolo[3,4-c]pyrazin-3-yl)ethanones in moderate yields. The structures of all the products were characterized thoroughly by NMR, IR, and HRMS.
由(Z)-N-芳基-2-氧代
丙烷肼基
甲酰氯溴化物和Et3N原位生成的腈
亚胺的1,3-偶极环加成反应生成3-芳基
吡咯并[1,2- a ]
吡嗪,提供了新型的1-(1,5-二芳基-1,10b-二氢
吡咯并[1,2- a ] [1,2,4]三唑并[3,4- c ]
吡嗪-3-基)
乙炔,产率中等。所有产品的结构均通过NMR,IR和HRMS进行了全面表征。