Constrained (l-)-S-adenosyl-l-homocysteine (SAH) analogues as DNA methyltransferase inhibitors
作者:Ljubomir Isakovic、Oscar M. Saavedra、David B. Llewellyn、Stephen Claridge、Lijie Zhan、Naomy Bernstein、Arkadii Vaisburg、Nadine Elowe、Andrea J. Petschner、Jubrail Rahil、Norman Beaulieu、France Gauthier、A. Robert MacLeod、Daniel Delorme、Jeffrey M. Besterman、Amal Wahhab
DOI:10.1016/j.bmcl.2009.03.132
日期:2009.5
Potent SAH analogues with constrained homocysteine units have been designed and synthesized as inhibitors of human DNMT enzymes. The five membered (2S,4S)-4-mercaptopyrrolidine-2-carboxylic acid, in 1a, was a good replacement for homocysteine, while the corresponding six-member counterpart was less active. Further optimization of 1a, changed the selectivity pro. le of these inhibitors. A Chloro substituent at the 2-position of 1a, compound 1d, retained potency against DNMT1, while N-6 alkylation, compound 7a, conserved DNMT3b2 activity. The concomitant substitutions of 1a at both 2- and N-6 positions reduced activity against both enzymes. (C) 2009 Elsevier Ltd. All rights reserved.