substituted benzimidazole 2 has been used as a starting point for further optimization of an LHRH antagonist series. SAR studies revealed that a tert-butyl urea fragment connected through a simple carbon chain would improve activity. Further modification of the benzylsulfonamide moiety led to the discovery of 23 (IC(50): 4.2 nM).
2-环丙基取代的
苯并咪唑2已被用作进一步优化LHRH拮抗剂系列的起点。
SAR研究表明,通过一条简单的碳链连接的叔丁基
脲片段会提高活性。苄基磺酰胺部分的进一步修饰导致发现23(IC(50):4.2 nM)。