Kinesin spindle protein (KSP) inhibitors. Part V: discovery of 2-propylamino-2,4-diaryl-2,5-dihydropyrroles as potent, water-soluble KSP inhibitors, and modulation of their basicity by beta-fluorination to overcome cellular efflux by P-glycoprotein.

Abstract:

:Installation of a C2-aminopropyl side chain to the 2,4-diaryl-2,5-dihydropyrrole series of kinesin spindle protein (KSP) inhibitors results in potent, water soluble compounds, but the aminopropyl group induces susceptibility to cellular efflux by P-glycoprotein (Pgp). We show that by carefully modulating the basicity of the amino group by beta-fluorination, this series of inhibitors maintains potency against KSP and has greatly improved efficacy in a Pgp-overexpressing cell line. The discovery that cellular efflux by Pgp can be overcome by carefully modulating the basicity of an amine may be of general use to medicinal chemists attempting to transform leading compounds into cancer cell- or CNS-penetrant drugs.

journal_name

Bioorg Med Chem Lett

authors

Cox CD,Breslin MJ,Whitman DB,Coleman PJ,Garbaccio RM,Fraley ME,Zrada MM,Buser CA,Walsh ES,Hamilton K,Lobell RB,Tao W,Abrams MT,South VJ,Huber HE,Kohl NE,Hartman GD

doi

10.1016/j.bmcl.2007.03.006

subject

Has Abstract

pub_date

2007-05-15 00:00:00

pages

2697-702

issue

10

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(07)00299-5

journal_volume

17

pub_type

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