5-Fluoro- and 5-chlorocyclophosphamide: synthesis, metabolism, and antitumor activity of the cis and trans isomers
作者:Allan B. Foster、Michael Jarman、Ryszard W. Kinas、Johannes M. S. Van Maanen、Grahame N. Taylor、John L. Gaston、Ann Parkin、Anthony C. Richardson
DOI:10.1021/jm00144a006
日期:1981.12
comparable to that of cyclophosphamide. However, there was no evidence that the yield of phosphoramide mustard produced by the trans analogues were significantly greater than that from cyclophosphamide following microsomal 4-hydroxylation. Hence, the halogen substituents did not accelerate beta-elimination of acrolein from the acyclic aldehydo tautomers. As expected, the poorly metabolized cis-5-fluoride (9)
1-Amino-3-(aminooxy)-2-propanol (6a) has been synthesized and found to inhibit rat liver ornithine decarboxylase (ODC) with an IC50 in the nanomolar range. Compound 6a served as a basis for the design of new enzyme inhibitors, which led to the identification of 3-(aminooxy)-2-fluoropropanamine (15) as a new powerful enzyme blocker. Compound 15 inhibited ODC at 3 times lower concentrations than 6a and 3-(aminooxy)propanamine (APA), and it was superior to APA as an antiproliferative agent in inhibiting the growth of human T24 bladder carcinoma cells in vitro.
Oxyguanidines: application to non-peptidic phenyl-based thrombin inhibitors
作者:Bruce Tomczuk、Tianbao Lu、Richard M Soll、Cynthia Fedde、Aihua Wang、Larry Murphy、Carl Crysler、Malini Dasgupta、Stephen Eisennagel、John Spurlino、Roger Bone
DOI:10.1016/s0960-894x(03)00125-2
日期:2003.4
Although thrombin has been extensively researched with many examples of potent and selective inhibitors, the key characteristics of oral bioavailability and long half-life have been elusive. We report here a novel series non-peptidic phenyl-based, highly potent, highly selective and orally bioavailable thrombin inhibitors using oxyguanidines as guanidine-mimetics. (C) 2003 Elsevier Science Ltd. All rights reserved.