Development of a novel series of (2-quinolinylmethoxy)phenyl-containing compounds as high-affinity leukotriene receptor antagonists. 1. Initial structure-activity relationships
摘要:
This series of reports describes the development of orally active, highly potent, specific antagonists of the peptidoleukotrienes containing a (2-quinolinylmethoxy)phenyl moiety. Described in this first report are the structure-activity relationships that led to a more than a 20-fold improvement of the potency and selectivity of the initial chemical lead (RG 5901). From this series of compounds, RG 7152 (16) was identified and selected for further evaluation in the clinic as an antiasthmatic agent. Compound 16 competitively inhibits [3H]LTD4 binding to membranes from guinea pig lung (Ki = 38 +/- 6 nM) and the spasmogenic activity of LTC4, LTD4, and LTE4 in parenchymal lung strips from guinea pigs. Unlike the original lead (RG 5901), compound 16 does not inhibit 5-lipoxygenase from guinea pig PMNs. Following oral administration to guinea pigs, 16 blocks LTD4-induced dermal permeability (ED50 = 6.9 mg/kg), LTD4-induced bronchoconstriction (ED50 = 1.1 mg/kg), antigen-induced bronchoconstriction (ED50 = 2.5 mg/kg), and anaphylactic-induced mortality (ED50 = 16 mg/kg). These studies on structure-activity relationships indicate that there is a requirement for an acidic function and the presence of the (2-quinolinylmethoxy)phenyl moiety in a specific geometric arrangement.
Nitrogenous Educts through Oxidative Amidation of Phenols: The Bimolecular Reaction
作者:Sylvain Canesi、Denis Bouchu、Marco A. Ciufolini
DOI:10.1021/ol048094v
日期:2005.1.1
[Reaction: see text] The elusive oxidative amidation of phenols to 4-aza-substituted dienones in the bimolecular mode may be achieved by treatment with iodobenzene diacetate ("DIB") in a mixture of hexafluoro-2-propanol and acetonitrile.
The development of a novel series of (quinolin-2-ylmethoxy)phenyl-containing compounds as high-affinity leukotriene receptor antagonists. 3. Structural variation of the acidic side chain to give antagonists of enhanced potency
作者:Robert A. Galemmo、William H. Johnson、Keith S. Learn、Thomas D. Y. Lee、Fu Chih Huang、Henry F. Campbell、Raymond Youssefyeh、Susan V. O'Rourke、Glenn Schuessler
DOI:10.1021/jm00172a024
日期:1990.10
This paper is the third in a series outlining the development of orally active sulfido peptide leukotriene antagonists containing a (quinolin-2-ylmethoxy)phenyl moiety. In this work the systematic variation of the acid side chain substituents led to dramatic and reproducible changes in the oral activity of these compounds, presumably due to alterations in their pharmacokinetic properties. The most potent compound identified, 5-[4-[4-(quinolin-2-yl-methoxy)phenyl]-3-methylbutyl]tetrazole (32), represents a convergence of good in vitro antagonist activity and a 3-10-fold improvement in oral potency over the current clinical candidate 2. The new findings from these optimization studies are as follows: oxygen substitution in the acid side chain was not necessary for antagonist activity, in vitro and in vivo activity was enhanced by alkyl or phenyl substitution on the gamma-carbon of the acid side chain of para-substituted (quinolin-2-ylmethoxy)phenyl derivatives, and free rotation about the side chain carbon atom adjacent to the (quinolin-2-ylmethoxy)phenyl ring was required for activity. The lead compound of this report (32) is a competitive inhibitor of [3H]LTD4 binding to receptor membrane purified from guinea pig lung (Ki = 12 +/- 3 nM) and of the spasmogenic activity of LTC4, LTD4, and LTE4 in guinea pig lung strip. Dosed orally in guinea pigs, this compound blocks LTD4-induced bronchoconstriction (ED50 0.8 mg/kg) and antigen-induced systemic anaphylaxis (ED50 = 1.2 mg/kg).
Synthetic ventures inspired by biosynthetic hypotheses: the evolution of a method for the oxidative amidation of phenols
作者:Marco A. Ciufolini、Sylvain Canesi、Malika Ousmer、Norbert A. Braun
DOI:10.1016/j.tet.2006.01.111
日期:2006.5
We describe the development of a technique for the oxidative conversion of 4-alkyl phenols to derivatives of the corresponding 4-alkyl-4-amino-2,5-cyclohexanediones. This transformation, which was inspired by biogenetic considerations, constitutes a key step in the total syntheses of FR-901483, TAN-1251C, and cylindricine C. (c) 2006 Elsevier Ltd. All rights reserved.