61310-29-0Relevant articles and documents
Synthesis and SAR studies of 5-(pyridin-4-yl)-1,3,4-thiadiazol-2-amine derivatives as potent inhibitors of Bloom helicase
Rosenthal, Andrew S.,Dexheimer, Thomas S.,Gileadi, Opher,Nguyen, Giang H.,Chu, Wai Kit,Hickson, Ian D.,Jadhav, Ajit,Simeonov, Anton,Maloney, David J.
, p. 5660 - 5666 (2013/10/01)
Human cells utilize a variety of complex DNA repair mechanisms in order to combat constant mutagenic and cytotoxic threats from both exogenous and endogenous sources. The RecQ family of DNA helicases, which includes Bloom helicase (BLM), plays an important function in DNA repair by unwinding complementary strands of duplex DNA as well as atypical DNA structures such as Holliday junctions. Mutations of the BLM gene can result in Bloom syndrome, an autosomal recessive disorder associated with cancer predisposition. BLM-deficient cells exhibit increased sensitivity to DNA damaging agents indicating that a selective BLM inhibitor could be useful in potentiating the anticancer activity of these agents. In this work, we describe the medicinal chemistry optimization of the hit molecule following a quantitative high-throughput screen of >355,000 compounds. These efforts lead to the identification of ML216 and related analogs, which possess potent BLM inhibition and exhibit selectivity over related helicases. Moreover, these compounds demonstrated cellular activity by inducing sister chromatid exchanges, a hallmark of Bloom syndrome.
N-(2-(pyridinyl)-4-pyrimidinyl)-aminomethylenemalonates and analogs
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, (2008/06/13)
Compounds useful as anti-allergic agents are 2-Q-4-[XZC=C(R)NH]-5-R1 -6-R2 -pyrimidines (I), where Q is 4- or 3- or 2-pyridinyl or 4- or 3- or 2-pyridinyl having one or two lower-alkyl substituents or N-oxide thereof, R is hydrogen or lower-alkyl, R1 is hydrogen, lower-alkyl or cyano, R2 is hydrogen, lower-alkyl, hydroxy or halo, X and Z are the same or different and are each selected from lower-carbalkoxy, lower-alkanoyl, carbamyl and cyano, or STR1 where R3 and R4 are each lower-alkyl, or X is hydrogen, are prepared by reacting 4-amino-2-Q-5-R1 -6-R2 -pyrimidine (II where Q' is amino) with R'O-C-(R)=CXZ (III). Preparations of II are given. Also shown as intermediates and/or anti-allergic agents are 4-(AcNH)-2-Q-5-R1 -6-R2 -pyrimidines (IV) and 4-(R5 R6 N)-2-Q-5-R1 -6-R2 -pyrimidines (V) where Ac is lower-alkanoyl or lower-carbalkoxy, R5 is hydrogen, lower-alkyl or lower-hydroxyalkyl, and R6 is lower-alkyl or lower-hydroxyalkyl.