Purine derivatives as potent Bruton's tyrosine kinase (BTK) inhibitors for autoimmune diseases.
Shi, Q., Tebben, A., Dyckman, A.J., Li, H., Liu, C., Lin, J., Spergel, S., Burke, J.R., McIntyre, K.W., Olini, G.C., Strnad, J., Surti, N., Muckelbauer, J.K., Chang, C., An, Y., Cheng, L., Ruan, Q., Leftheris, K., Carter, P.H., Tino, J., De Lucca, G.V.(2014) Bioorg Med Chem Lett 24: 2206-2211
- PubMed: 24685542 
- DOI: 10.1016/j.bmcl.2014.02.075
- Primary Citation of Related Structures:  
4NWM - PubMed Abstract: 
Investigation of various heterocyclic core isosteres of imidazopyrazines 1 & 2 yielded purine derivatives 3 & 8 as potent and selective BTK inhibitors. Subsequent SAR studies of the purine series led to the discovery of 20 as a leading compound. Comp ...