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5-Benzamidoisoquinolin-1-ones and 5-(omega-Carboxyalkyl)isoquinolin-1-ones as Isoform-Selective Inhibitors of Poly(ADP-ribose) Polymerase 2 (PARP-2)


Reference:

Sunderland, P. T., Woon, E. C. Y., Dhami, A., Bergin, A. B., Mahon, M. F., Wood, P. J., Jones, L. A., Tully, S. R., Lloyd, M. D., Thompson, A. S., Javaid, H., Martin, N. M. B. and Threadgill, M. D., 2011. 5-Benzamidoisoquinolin-1-ones and 5-(omega-Carboxyalkyl)isoquinolin-1-ones as Isoform-Selective Inhibitors of Poly(ADP-ribose) Polymerase 2 (PARP-2). Journal of Medicinal Chemistry, 54 (7), pp. 2049-2059.

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Official URL:

http://dx.doi.org/10.1021/jm1010918

Abstract

PARP-2 is a member of the poly(ADP-ribose) polymerase family, with some activities similar to those of PARP-1 but with other distinct roles. Two series of isoquinolin-1-ones were designed, synthesized, and evaluated as selective inhibitors of PARP-2, using the structures of the catalytic sites of the isoforms. A new efficient synthesis of 5-aminoisoquinolin-1-one was developed, and acylation with acyl chlorides gave 5-acylaminoisoquinolind-1-ones. By examination of isoquinolin-1-ones with carboxylates tethered to the 5-position, Heck coupling of 5-iodoisoquinolin-1-one furnished the 5-CH = CHCO2H compound for reduction to the 5-propanoic acid. Alkylation of 5-aminoisoquinolin-1-one under mildly basic conditions, followed by hydrolysis, gave 5-(carboxymethylamino)isoquinolin-1-one, whereas it was alkylated at 2-N with methyl propenoate and strong base. Compounds were assayed in vitro for inhibition of PARP-1 and PARP-2, using Flash Plate and solution-phase assays, respectively. The 5-benzamidoisoquinolin-1-ones were more selective for inhibition of PARP-2, whereas the 5-(omega-carboxyalkl)isoquinolin-1-ones were less so. 5-Benzamidoisoquinolin-1-one is the most PARP-2-selective compound (IC50(PARP-1)/IC50(PARP-2) = 9.3) to date, in a comparative study.

Details

Item Type Articles
CreatorsSunderland, P. T., Woon, E. C. Y., Dhami, A., Bergin, A. B., Mahon, M. F., Wood, P. J., Jones, L. A., Tully, S. R., Lloyd, M. D., Thompson, A. S., Javaid, H., Martin, N. M. B. and Threadgill, M. D.
DOI10.1021/jm1010918
DepartmentsFaculty of Science > Chemistry
Faculty of Science > Pharmacy & Pharmacology
RefereedYes
StatusPublished
ID Code23696

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