One-Pot Synthesis and Characterization of Some New Types of 5,5′-Disubstituted Bis(imidazolidine-2,4-diones)
作者:Ziba Khodaee、Asieh Yahyazadeh、Nosrat O. Mahmoodi
DOI:10.1002/jhet.1034
日期:2013.3
The synthesis and structural elucidation of some novel 5,5′‐disubstituted spiro and nonspiro‐bis‐hydantoins are reported. The Bucherer Burge's method has been modified for the preparation of some 5,5′‐substituted bis(imidazolidine‐2,4‐dione) derivatives starting with diketones (1–5) and dialdehydes (6, 7). In some cases, diastereoisomeric mixtures of compounds were obtained. The resulting bis‐hydantoins
A rotaxane consisting of a cucurbituril and an uncharged guest molecule, having low or null affinity therebetween is provided as well as processes for providing the same. Various uses as energy converters (“frictionless” molecular motors), biochips and biosensors using the same are also provided.
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.
US8715635B2
申请人:——
公开号:US8715635B2
公开(公告)日:2014-05-06
[EN] FRICTIONLESS MOLECULAR ROTARY MOTORS<br/>[FR] MOTEURS ROTATIFS MOLÉCULAIRES SANS FROTTEMENT
申请人:TECHNION RES & DEV FOUNDATION
公开号:WO2008096360A2
公开(公告)日:2008-08-14
[EN] A rotaxane consisting of a cucurbituril and an uncharged guest molecule, having low or null affinity therebetween is provided as well as processes for providing the same. Various uses as energy converters ("frictionless" molecular motors), biochips and biosensors using the same are also provided. [FR] L'invention concerne une rotaxane consistant en un cucurbituril et une molécule invitée non chargée, ayant une affinité faible ou nulle entre elles, ainsi que des procédés pour les fabriquer. L'invention concerne également diverses utilisations en tant que convertisseurs d'énergie (moteurs moléculaires "sans frottement"), puces biologiques et capteurs biologiques les utilisant.