The reaction of 2-(bromomethyl)benzonitrile with methyl 3-aminothiophene-2-carboxylate results in two tautomeric thienopyrimidoisoindolones. Their methylation yields 5-methylthieno[2',3':5,6]pyrimido[2,1-a]isoindol-4(5H)-one which reacts with N-substituted maleimides and dimethyl acetylenedicarboxylate.
2-(溴甲基)苯甲腈与甲基3-氨基噻吩-2-羧酸酯发生反应,生成两种互变异构的噻吩嘧啶异异吲哚酮。它们的甲基化产生5-甲基噻吩[2',3':5,6]嘧啶[2,1-a]异吲哚-4(5H)-酮,可与N-取代马来酰亚胺和二甲基乙炔二羧酸酯发生反应。