Design of pentapeptidic BACE1 inhibitors with carboxylic acid bioisosteres at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:msubsup><mml:mrow><mml:mtext>P</mml:mtext></mml:mrow><mml:mrow><mml:mn mathvariant="bold">1</mml:mn></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math> and P4 positions
作者:Harichandra D. Tagad、Yoshio Hamada、Jeffrey-Tri Nguyen、Takashi Hamada、Hamdy Abdel-Rahman、Abdellah Yamani、Ayaka Nagamine、Hayato Ikari、Naoto Igawa、Koushi Hidaka、Youhei Sohma、Tooru Kimura、Yoshiaki Kiso
DOI:10.1016/j.bmc.2010.03.032
日期:2010.5
We previously reported potent BACE1 inhibitors KMI-420 and KMI-570 possessing a hydroxymethylcarbonyl isostere as a substrate transition-state mimic. Acidic moieties at the P-1' and P-4 positions of KMI inhibitors are thought to be unfavorable in terms of membrane permeability across the blood-brain barrier. Herein, we replaced acidic moieties at the P4 position with hydrogen bond accepting groups and acidic moieties at the P-1' position with less acidic and similar molecular-size moieties (carboxylic acid or tetrazole bioisosteres). These inhibitors exhibited improved BACE1 inhibitory activities and a thorough quantitative structure-activity relationship study was performed. (c) 2010 Elsevier Ltd. All rights reserved.