New greenfluorescentprotein (GFP) chromophoreanalogues, namely 4-(diarylmethylene)imidazolinones (DAINs), were readily synthesized under weakly acidic conditions using a novel condensation reaction between methyl imidate (or thioimidate) and ethyl N-(diarylmethylene)glycinate. DAINs showed notable fluorescence properties. Although they were nearly non-fluorescent in the solution, visible emissions
[EN] BICYCLIC 6-ALKYLIDENE-PENEMS AS ß-LACTAMASES INHIBITORS<br/>[FR] PENEMES 6-ALKYLIDENE BICYCLIQUES UTILISES EN TANT QU'INHIBITEURS DE ss-LACTAMASES
申请人:WYETH CORP
公开号:WO2003093279A1
公开(公告)日:2003-11-13
The present invention provides a compound of Formula (I), pharmaceutical compositions and the use thereof for the treatment of bacterial infection or disease in a patient in need thereof.
本发明提供了一种化合物(I)的配方、药物组合物以及其用于治疗患有细菌感染或疾病的患者的用途。
Quaternary heterocyclylamino .beta.-lactams: a generic alternative to the classical acylamino side chain
作者:John Hannah、Charles R. Johnson、Arthur F. Wagner、Edward Walton
DOI:10.1021/jm00346a024
日期:1982.4
beta-[(1-substituted-4-pyridinio)amino]ceph-3-em-4-carboxylates have been found to be interesting new classes of antibacterial beta-lactams, readily available by SN2 Ar coupling of fluoro-substituted quaternized pyridines and appropriate amino lactam carboxylic acids. Compared to penicillin G, the penam 12c exhibited a spectrum extended to Gram-negative species, such as Escherichia, Shigella, Klebsiella
Dithio- und Thionester, 54. Mitt.: Versuche zur Darstellung von α-Aminodithiosäureestern mit der Bislactimether-Methode
作者:Klaus Hartke、Andreas Brutsche
DOI:10.1002/ardp.19933260202
日期:——
5‐Piperazindithion (8) und nicht Glycindithiomethylester (6). Die durch Alkylieren von 5 erhaltenen Iminiumsalze 9 werden von H2S in die 1,4‐Dialkyl‐2,5‐piperazindithione 10 übergeführt. 5 bildet mit Chlorameisensäuremethylester 2,5‐Bis(methylthio)‐pyrazin (11) undmit Acetanhydrid das 1,4‐Dihydropyrazin 12. Die Sulfhydrolyse der6‐ und 7‐Ring‐Iminiumsalze 14 führt zu den Thiolactamen 15.
Reaction of lactim ethers and lactim sulfides with electrophiles: attack at nitrogen followed by ring-opening under neutral conditions
作者:Mariappan Anbazhagan、Arun N. Dixit、Srinivasachari Rajappa
DOI:10.1039/a700523g
日期:——
Electrophilic push-pull molecules react at the nitrogen of lactim
ethers and lactim sulfides; subsequent hydrolysis gives ring-opened
products in good yields.