plays an important role in forming the presence of intramolecularhydrogen bonds. The chemical shift of the Naryl-H downfield changes obviously, due to the formation of intramolecularhydrogen bonds and the deshielding effect of oxygen, and the neighboring C–H is activated and shows downfield protonic signal too. The presence of intramolecularhydrogen bonds probably provides the explanation for the transformation
Synthesis of novel iodo derived bicalutamide analogs
作者:Vipin A. Nair、Suni M. Mustafa、Michael L. Mohler、Scott J. Fisher、James T. Dalton、Duane D. Miller
DOI:10.1016/j.tetlet.2004.10.130
日期:2004.12
A series of optically active nonsteroidal selective androgen receptor modulators with structures analogous to bicalutamide was prepared by replacing the trifluoromethyl group with iodine and the sulfonyl linker by oxygen. (C) 2004 Elsevier Ltd. All rights reserved.
Design, Synthesis, and Pharmacological Characterization of 4-[4,4-Dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]- 2-iodobenzonitrile as a High-Affinity Nonsteroidal Androgen Receptor Ligand
作者:Marcian E. Van Dort、Diane M. Robins、Bess Wayburn
DOI:10.1021/jm000163y
日期:2000.8.1
4-[4,4-Dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]-2-trifluoromethylbenzonitrile (RU 59063) is a prototype of a new class of high-affinity nonsteroidal androgen receptor (AR) ligands. The search for a radioiodinated AR ligand prompted us to synthesize 4-[4,4-dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl]-2-iodobenzonitrile (DTIB) wherein the trifluoromethyl group of RU 59063 was substituted with the similarly hydrophobic iodine atom. DTIB displayed subnanomolar binding affinity (K-i = 0.71 +/- 0.22 nM) for the rat AR in competitive binding assays. Additionally, DTIB demonstrated potent agonist activity, comparable to that of the natural androgen 5 alpha-dihydrotestosterone (DHT), in a cell-based functional assay (cotransfection assay). DTIB represents a new lead for the development of high-affinity radioiodinated AR radioligands.