The present invention provides compounds of Formula I:
wherein A is selected from the group consisting of;
R
1
is H or F;
R
2
is H, —CH
2
OH, C
1
-C
3
alkyl,
R
3
is H, F, or CN;
R
4
is H, F; or CN; and
R
5
is H, —CH
3
, or —OCH
3
;
or a pharmaceutically acceptable salt thereof.
The present invention provides compounds of Formula I:
wherein A is selected from the group consisting of;
R1 is H or F;
R2 is H, —CH2OH, C1-C3 alkyl,
R3 is H, F, or CN;
R4 is H, F; or CN; and
R5 is H, —CH3, or —OCH3;
or a pharmaceutically acceptable salt thereof.
Maternal embryonic leucine zipper kinase (MELK) is involved in several key cellular processes and displays increased levels of expression in numerous cancer classes (colon, breast, brain, ovary, prostate and lung). Although no selective MELK inhibitors have yet been approved, increasing evidence suggest that inhibition of MELK would constitute a promising approach for cancer therapy. A weak high-throughput screening hit (17, IC50 approximate to 5 mu M) with lead-like properties was optimized for MELK inhibition. The early identification of a plausible binding mode by molecular modeling offered guidance in the choice of modifications towards compound 52 which displayed a 98 nM IC50. A good selectivity profile was achieved for a representative member of the series (29) in a 486 protein kinase panel. Future elaboration of 52 has the potential to deliver compounds for further development with chemotherapeutic aims.
Bromination of 4-(2-thienyl)thiazoles and 2-(2-thienyl)quinoline
作者:V. A. Smirnov、A. V. Zimichev、G. A. Lyzhova、A. E. Lipkin