Development of highly selective and sensitive probes for hydrogen peroxideElectronic supplementary information (ESI) available: general methods. See http://www.rsc.org/suppdata/cc/b3/b309393j/
作者:Lee-Chiang Lo、Chi-Yuan Chu
DOI:10.1039/b309393j
日期:——
Probes that react specifically with hydrogen peroxide to release chromophoric or fluorescent reporter groups were designed and synthesized.
‘β-Acarbose’: A potential inhibitor of β-d-glucosidases and β-d-glucan hydrolases
作者:Joseph C McAuliffe、Robert V Stick、Bruce A Stone
DOI:10.1016/0040-4039(96)00298-5
日期:1996.4
‘β-Adiposin-2’, the 6″-hydroxylated derivative of ‘β-acarbose’, itself a diastereoisomer of the naturally occurring acarbose, has been prepared from a 1-epivalienamine derivative, and benzyl 2,3,6,2′,3′,6′-hexa-O-benzyl-β-cellobioside.
De novo synthesis of galacto-sugar δ-lactones via a catalytic osmium/palladium/osmium reaction sequence
作者:Md. Moinuddin Ahmed、George A. O’Doherty
DOI:10.1016/j.tetlet.2005.03.029
日期:2005.4
A highly efficient route to various 1,5-galacto-sugar lactones from dienoates has been developed by using three catalytic reactions. These reactions include (i) an enantioselective osmium-catalyzed dihydroxylation, (ii) a regio- and diastereoselective palladium-catalyzed pi-allyl alkylation with p-methoxyphenol for alcohol differentiation and protection, and (iii) a diastereoselective dihydroxylation that can be improved using matched emantioselective osmium-catalyzed dihydroxylation condition. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of quinazoline-2,4-dione and naphthalimide derivatives as new 5-HT3 receptor antagonists
New potent 5-HT3 receptor antagonists have been designed from the naphthalimide moiety and a quinuclidine heterocycle and the structure-activity relationships are discussed here on the basis of the nature of the substituent on the aromatic system. The biological activity of the compounds was evaluated in binding assays with [H-3]BRL-43694 and by inhibition of the Bezold-Jarisch reflex. Compound 22 with a 4-amino substituent was equipotent to the reference compounds. In contrast to the benzamide derivatives, the activity resides essentially in the (R) enantiomer (K-i = 0.15 +/- 0.05 nM, ID50 = 1.6 mu g/kg/iv) and it is demonstrated that the additional carbonyl group is involved in the inversion of the enantioselectivity of the receptor. Conformational studies of (R)-22 demonstrated the presence of a locked structure with 4 minimal energy conformers which were compared to those of (S)-zacopride. The superimposition of the putative active conformers emphasized the presence of a second polar group in the binding site. The fluorescent properties of the compounds were studied and indicate that (R)-22 and its derivatives may be promising tools for the direct visualization of 5-HT3 receptors.