Mar-Apr 1987 Selected Reactions on the o-Aminonitrile System of Substituted Pyrroles [1] Kurt Eger*, Johannes Georg Pfahl [la], Gerd Folkers and Hermann J. Roth Pharmaceutical Institute, University of Tuebingen, Auf der Morgenstelle 8, D-7400 Tuebingen, West Germany Received September 15, 1986 The synthesis of the difficult to obtain pyrrolo[2,3-ct]pyrimidine -2,4-diamine (4) is reported. Furthermore, some unexpected reactions on the ...