Verfahren zur Herstellung von 5-Arylhydantoinen durch Umsetzung von Allantoinsäurealkylester mit einer Arylverbindung in konzentrierter anorganischer Säure bei Temperaturen von Raumtemperatur bis 150 °C mit oder ohne einen Phasenvermittler.
Use of the hydantoin isostere to produce inhibitors showing selectivity toward the vesicular glutamate transporter versus the obligate exchange transporter system
作者:S. Kaleem Ahmed、Jean-Louis G. Etoga、Sarjubhai A. Patel、Richard J. Bridges、Charles M. Thompson
DOI:10.1016/j.bmcl.2011.05.018
日期:2011.7
Evidence was acquired prior to suggest that the vesicular glutamate transporter (VGLUT) but not other glutamate transporters were inhibited by structures containing a weakly basic a-amino group. To test this hypothesis, a series of analogs using a hydantoin (pK(a) similar to 9.1) isostere were synthesized and analyzed as inhibitors of VGLUT and the obligate cystine-glutamate transporter (system x(c)(-)). Of the hydantoin analogs tested, a thiophene-5-carboxaldehyde analog 2l and a bis-hydantoin 4b were relatively strong inhibitors of VGLUT reducing uptake to less than 6% of control at 5 mM but few inhibited system x(c)(-) greater than 50% of control. The benzene-2,4-disulfonic acid analog 2b and p-diaminobenzene analog 2e were also good hydantoin-based inhibitors of VGLUT reducing uptake by 11% and 23% of control, respectively, but neither analog was effective as a system x(c)(-) inhibitor. In sum, a hydantoin isostere adds the requisite chemical properties needed to produce selective inhibitors of VGLUT. (C) 2011 Elsevier Ltd. All rights reserved.
SPRUNG, W. -D.;KOBOW, M.;SCHULZ, ELISABETH, PHARMAZIE, 44,(1989) N, C. 540-542
作者:SPRUNG, W. -D.、KOBOW, M.、SCHULZ, ELISABETH
DOI:——
日期:——
US5436256A
申请人:——
公开号:US5436256A
公开(公告)日:1995-07-25
Identification of Carbonyl Compounds through Conversion into Hydantoins<sup>1</sup>