The invention relates to BET-protein-inhibiting, in particular BRD4-inhibiting, substituted phenyl-2,3-benzodiazepines of general formula (I), in which X, R1a, R1b, R1c, R2, R3, R4, and R5 have the meanings specified in the description, to pharmaceutical agents containing the compounds according to the invention, and to the prophylactic and therapeutic use of said pharmaceutical agents for hyperproliferative diseases, in particular tumor diseases. The invention further relates to the use of BET protein inhibitors in benign hyperplasias, atherosclerotic diseases, sepsis, autoimmune diseases, vascular diseases, viral infections, neurodegenerative diseases, inflammatory diseases, atherosclerotic diseases, and male fertility control.
