Design, synthesis and SAR of novel ethylenediamine and phenylenediamine derivatives as factor Xa inhibitors
摘要:
We previously reported on a series of cyclohexanediamine derivatives as highly potent factor Xa inhibitors. Herein, we describe the modification of the spacer moiety to discover an alternative scaffold. Ethylenediamine derivatives possessing a substituent at the C1 position in S configuration and phenylenediamine derivatives possessing a substituent at the C5 position demonstrated moderate to strong anti-fXa activity. Further SAR studies led to the identification of compound 30h which showed both good in vitro activity (fXa IC50 = 2.2 nM, PTCT2 = 3.9 mu M) and in vivo antithrombotic efficacy. (C) 2011 Elsevier Ltd. All rights reserved.
Design, synthesis and SAR of novel ethylenediamine and phenylenediamine derivatives as factor Xa inhibitors
摘要:
We previously reported on a series of cyclohexanediamine derivatives as highly potent factor Xa inhibitors. Herein, we describe the modification of the spacer moiety to discover an alternative scaffold. Ethylenediamine derivatives possessing a substituent at the C1 position in S configuration and phenylenediamine derivatives possessing a substituent at the C5 position demonstrated moderate to strong anti-fXa activity. Further SAR studies led to the identification of compound 30h which showed both good in vitro activity (fXa IC50 = 2.2 nM, PTCT2 = 3.9 mu M) and in vivo antithrombotic efficacy. (C) 2011 Elsevier Ltd. All rights reserved.
作者:Stefan G. Koenig、Charles P. Vandenbossche、Hang Zhao、Patrick Mousaw、Surendra P. Singh、Roger P. Bakale
DOI:10.1021/ol802482d
日期:2009.1.15
Imidoyl chlorides, generated from secondary acetamides and oxalylchloride, can be harnessed for a selective and practical deprotection sequence. Treatment of these intermediates with 2 equiv of propylene glycol and warming enables the rapid release of aminehydrochloride salts in good yields. Notably, the reaction conditions are mild enough to allow for a swift deprotection with no observed epimerization