Bioorganic and medicinal chemistry letters p. 3537 - 3541 (2002)
Update date:2022-08-05
Topics:
Fraley, Mark E
Rubino, Robert S
Hoffman, William F
Hambaugh, Scott R
Arrington, Kenneth L
Hungate, Randall W
Bilodeau, Mark T
Tebben, Andrew J
Rutledge, Ruth Z
Kendall, Richard L
McFall, Rosemary C
Huckle, William R
Coll, Kathleen E
Thomas, Kenneth A
We have introduced solubilizing functionality to a 3,6-disubstituted pyrazolo[1,5-a]pyrimidine series of KDR kinase inhibitors to improve the physical properties of these compounds. The addition of a basic side-chain to the 6-aryl ring, introduction of 3-pyridyl groups, and most significantly, incorporation of a 4-pyridinonyl substituent at the 6-position of the core are modifications that maintain and often enhance the intrinsic potency of this class of inhibitors. Moreover, the improvements in physical properties result in marked increases in cellular activity and more favorable pharmacokinetics in rats. The synthesis and SAR of these compounds are described.
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