Mechanism of Inactivation of β-Lactamases by Novel 6-Methylidene Penems Elucidated Using Electrospray Ionization Mass Spectrometry
摘要:
The reactions of 6-methylidene penems 4-7 with beta-lactamases (TEM-1, SHV-1, Amp-C) were characterized by electrospray ionization mass spectrometry (ESI-MS). The kinetics of the reactions were monitored, demonstrating that only one penem. molecule reacts to form an acyl-enzyme complex. For penem 5, the ESI-MS/MS spectrum of the hydrolysis product produced in the reaction was identical to the spectrum generated from a synthesized dihydro[1,4]thiazepine 10, confirming the rearrangement of the penem ring system to a seven-membered dihydro[1,4]thiazepine structure. Gas-phase ESI-MS/MS fragmentation data were rationalized due to tautomerization between imine and enamine substructures. ESI-MS/MS analysis of the T-6 trypsin-digested fragments of TEM-1 and SHV-1 demonstrated that the penems were only attached to Ser-70 of these class A beta-lactamases and that the penem ring structures were rearranged to seven-membered dihydro[1,4]thiazepines.
IMIDAZOLOPYRIMIDINE ANALOGS AND THEIR USE AS PI3 KINASE AND MTOR INHIBITORS
申请人:Bursavich Matthew Gregory
公开号:US20080233127A1
公开(公告)日:2008-09-25
The present invention relates to Imidazolopyrimidine Analogs, methods of making Imidazolopyrimidine Analogs, compositions comprising an Imidazolopyrimidine Analog, and methods for treating or preventing a PI3K-related disorder comprising administering to a subject in need thereof an effective amount of an Imidazolopyrimidine Analog. The invention also relates to methods for treating or preventing mTOR-related disorders comprising administering to a subject in need thereof an effective amount of an Imidazolopyrimidine Analog.
Process for preparing 6-alkylidene penem derivatives
申请人:Wyeth
公开号:US20040132708A1
公开(公告)日:2004-07-08
The present invention provides a process of making compounds of formula I, which are useful for the treatment of bacterial infection or disease.
1
本发明提供了一种制备式I化合物的方法,该化合物对治疗细菌感染或疾病有用。
Bicyclic 6-alkylidene-penems as class-D beta-lactamases inhibitors
申请人:Mansour Suhayl Tarek
公开号:US20060276445A1
公开(公告)日:2006-12-07
This invention relates to certain bicyclic 6-alkylidene penems which act as a inhibitor of class-D enzymes. β-Lactamases hydrolyze β-lactam antibiotics, and as such serve as the primary cause of bacterial resistance. The compounds of the present invention when combined with β-lactam antibiotics will provide an effective treatment against life threatening bacterial infections.
In accordance with the present invention there are provided compounds of general formula I or a pharmaceutically acceptable salt or in vivo hydrolyzable ester R
5
thereof:
wherein: One of A and B denotes hydrogen and the other an optionally substituted fused bicyclic heteroaryl group; and X═O or S.
[EN] PROCESS FOR PREPARING 6-ALKYLIDENE PENEM DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES DE 6-ALKYLIDENE PENEM
申请人:WYETH CORP
公开号:WO2003093277A1
公开(公告)日:2003-11-13
The present invention provides a process of making compounds of Formula (I), which are useful for the treatment of bacterial infection or disease.
本发明提供了一种制备化合物的方法,该化合物符合式(I),对于治疗细菌感染或疾病非常有用。
Processes For Preparing Bicyclic Oxazine Carboxaldehyde and Beta-Lactamase Inhibitors
申请人:Kremer Kenneth Alfred Martin
公开号:US20090018332A1
公开(公告)日:2009-01-15
The invention relates to processes for the preparation of the bicyclic oxazine carboxaldehyde Compound 1:
The invention also relates to the use of Compound 1 in the preparation of □-lactamase inhibitors.