DERIVATIVES OF 1-[(CYCLOPENTYL OR 2-PYRROLIDINYL)CARBONYLAMINOMETHYL]-4-(1,3-THIAZOL-5-YL) BENZENE WHICH ARE USEFUL FOR THE TREATMENT OF PROLIFERATIVE, AUTOIMMUNE OR INFLAMMATORY DISEASES

There is provided novel small molecule E3 ubiquitin ligase protein binding ligand compounds, having utility in PROteolysis Targeted Chimeras (PROTACs), as well as processes for the preparation thereof, and use in medicine. There is particularly provided PROTACs which bind to a protein within the bromo- and Extra-terminal (BET) family of proteins, and especially to PROTACs including novel small molecule E3 ubiquitin ligase protein binding ligand compounds which selectively induce degradation of the BRD4 protein within the bromodomain of the BET family of proteins.