2-(1-Alkylthio-2-cyanoethenyl)pyrroles were synthesized in good to hig
h yields by reaction of pyrrole-2-dithiocarboxylates with active methy
lene nitriles in a KOH-DMSO medium. The condensation of 4,5,6,7-tetrah
ydroindole with cyanoacetate also leads to ,5,6,7-tetrahydrocyclohexa-
[c]-3H-pyrrolizin-3-one in 61% yield. The effect of substituent on the
reaction course has been studied. The dipole moments and spectral cha
racteristics of products are presented.