Pyrido [3,2-h] quinazolines and / or 5,6-dihydro derivatives thereof, process for their preparation and organic semiconductor material containing the same dopant.

Pyrido [3,2-h] quinazolines of the following structure 8: ** (See formula) ** and / or 5,6-dihydro derivatives thereof, wherein R1 and R2 are aryl, heteroaryl, alkyl of the formula CHR2 with R = alkyl with C1-C20 alkyl or of the formula CR3, substituted or unsubstituted, where R = alkyl with C1-C20; R3 is selected from H, C1-C20 alkyl, aryl and heteroaryl, substituted or unsubstituted; R4 is selected from H, alkyl C1-C20, aryl, heteroaryl, substituted or unsubstituted, NH2, NHR, where R is alkyl C1-C20, NR2, wherein R is alkyl with C1-C20, N-alkylaryl, N -arilo2, carbazolyl, dibenzazepinilo and CN.