Shoji, Taku Molecular Transformation to Pyrroles, Pentafulvenes, and Pyrrolopyridines by [2+2] Cycloaddition of Propargylamines with Tetracyanoethylene. [electronic resource] - Chemistry (Weinheim an der Bergstrasse, Germany) Feb 2020 - 1931-1935 p. digital Publication Type: Journal Article ISSN: 1521-3765 Standard No.: 10.1002/chem.201904926 doi