Cyclic urea derivatives as potent NK1 selective antagonists. Part II: Effects of fluoro and benzylic methyl substitutions
2006
A series of novel five-membered urea derivatives as potent NK 1 receptor antagonists is described. The effects of substitution of a 4-fluoro group at the phenyl ring and the introduction of an α-methyl group at the benzylic position to improve potency and duration of in vivo activity are discussed. Several compounds with high affinity and sustained in vivo activity were identified.
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