823197-97-3Relevant academic research and scientific papers
1-Aryl-2-chloro-5-methoxy-1H-3-pyrrolecarbaldehyde as synthons for fused heterocycles: synthesis of pyrazolo[3,4-d]pyrrolo[2,3-b]pyridine derivatives
El-Nabi, Hisham A. Abd
, p. 325 - 327 (2007/10/03)
Pyrazolo[3,4-d]pyrrolo[2,3-b]pyridine derivatives (6a-f) were obtained by oxidation of tosylhydrazones of 2-allylamino-5-methoxypyrrole-3-carbaldehydes (3a-f) with lead tetraacetate. The nitrilimine intermediates (5a-f) underwent intramolecular 1,3-dipolar cycloaddition to yield the tricyclic heterocycles 6a-f in good yields.
