Synthesis and evaluation of stilbenylbenzoxazole and stilbenylbenzothiazole derivatives for detecting β-amyloid fibrils
作者:Ji Hoon Lee、Seong Rim Byeon、Soo Jeong Lim、Seung Jun Oh、Dae Hyuk Moon、Kyung Ho Yoo、Bong Young Chung、Dong Jin Kim
DOI:10.1016/j.bmcl.2007.10.004
日期:2008.2
This paper describes a novel series of stilbenylbenzoxazole ( SBO) and stilbenylbenzothiazole ( SBT) derivatives for beta- amyloid specific binding probes. These 24 compounds were synthesized and evaluated by competitive binding assay against beta- amyloid 1 - 42 ( A beta 42) aggregates using [I-125] TZDM. All the derivatives displayed higher binding affinities with K-i value in the subnanomolar range ( 0.10 - 0.74 nM) than Pittsburgh Compound- B ( PIB) ( 0.77 nM). Among these derivatives, SBT- 2, 5-. uoroethoxy- 2- 4-[ 2-( 4- methylaminophenyl) vinyl] phenyl} benzothiazole, showed lowest K-i value ( 0.10 nM). In conclusion, the preliminary results suggest that these compounds are implying a possibility as a probe for detection of A beta fibrils in Alzheimer's disease (AD) patients. (C) 2007 Elsevier Ltd. All rights reserved.
Metabolic N-hydroxylation. Use of substituent variation to modulate the in vitro bioactivation of 4-acetamidostilbenes
作者:Patrick E. Hanna、Richard E. Gammans、Russell D. Sehon、Man-Kil Lee
DOI:10.1021/jm00183a014
日期:1980.9
radiolabeled form, and the metabolites were identified and quantified by TLC, massspectrometry, and liquid scintillation counting. The Vmax for N-hydroxylation of the 4'-CN analogue was 24% and the Km was 11% of that of 1. The glycolamide was a minor metabolite of the 4'-CN compound. The principal metabolite of the 4'-CH3 compound was the 4'-CH2OH derivative, the N-hydroxylated product being formed in small