Glycine-substituted thieno[2,3-d]pyrimidines with combined LH and FSH agonistic activity

摘要

The present invention resides in glycine substituted thieno[2,3-d]pyrimidine derivatives according to general formula I, or a pharmaceutically acceptable salt thereof, wherein X is O or H,H A is S, NH, N(R⁶), O or a bond; R¹ is (1-4C)alkyl, (2-4C)alkenyl, phenyl or (2-5C)heteroaryl, the phenyl or heteroaryl ring optionally being substituted with one or more of the group of substituents: hydroxy, halogen, nitro, trifluoromethyl, cyano, amino or (1-4C)(di)alkylamino and R² is H, (1-4C)alkyl, (1-4C)alkoxy(2-4C)alkyl or hydroxy(2-4C)alkyl; R³ and R⁴ can be independently selected from H and hydroxy(1-4C)alkyl; R⁵ is H or (1-4C)alkyl; R⁶ can be selected from the same groups as described for R¹. The compounds of the invention have LH as well as FSH receptor activating activity and can be used in fertility regulating therapies.