Abstract:
A process of synthesizing a carbapenem compound of formula (6) is disclosed wherein R represents H or methyl, P and P* independently represent H or protecting groups and each R is independently selected from: H, halo, OH, OP wherein P is a protecting group, C1-6 alkyl or C1-6 alkyl substituted with 1-3 of halo, OH, OP, NH2, NHC1-4 alkyl or N(C1-4 alkyl)2.
Abstract:
The invention describes an improved process for synthesizing 1- beta -methyl-2-hydroxymethyl substituted carbapenems as key intermediates for the synthesis of anti-MRSA carbapenem antibiotics. The synthesis eliminates the use of BU3SnCH2OH and HMPA, which are toxic substances and not amenable to industrial scale production. The novel intermediates are also within the scope of this invention.
Abstract:
The present invention relates to an improved process for the preparation of the carbapenem antibiotic of formula (I) or its salts, hydrates and esters. The present invention further provides novel crystalline form of compound of general formula (III), wherein R 3 is p-nitrobenzyloxy carbonyl.
Abstract:
A process for producing either a carbapenem-type antibacterial (4) having a 1-alkylpyrrolidine structure or a salt thereof, the process being shown by the following reaction formula; a compound represented by the formula (1) or a salt thereof which are useful intermediates therefor; and a process for producing the compound or salt. (1) } (4). In the formula, R represents C1-3 alkyl, and R and R each independently represents hydrogen, etc.
Abstract:
beta -Lactam compounds represented by the following general formula [1], pharmaceutically acceptable salts thereof or nontoxic esters of the same wherein R represents lower alkyl, etc.; R represents H or lower alkyl; X represents O, S or NH; m and n are each 0 to 4; Y represents halogeno, etc.; and Y represents H, optionally substituted lower alkyl, etc. These compounds show an excellent antibacterial activity against gram-positive bacteria, in particular, methicillin resistant Staphylococcus aureus and methicillin resistant coagulase-negative Staphylococcus aureus .
Abstract translation:由以下通式[1]表示的β-内酰胺化合物,其药学上可接受的盐或其中R 1表示低级烷基等的无毒酯; R 2表示H或低级烷基; X表示O,S或NH; m和n各自为0至4; Y 1表示卤代等; 并且Y 2表示H,任选取代的低级烷基等。这些化合物对革兰氏阳性细菌,特别是耐甲氧西林金黄色葡萄球菌和耐甲氧西林凝固酶阴性显示出优异的抗菌活性 >金黄色葡萄球菌 i>。
Abstract:
Disclosed is a process for preparing Tebipenem Pivoxil and analogues thereof. The process uses a carbapenem compound salt of the formula II as a raw material to obtain a carbapenem compound ester of the formula I, wherein the carbapenem compound salt of the formula II is obtained by directly reacting a carbapenem compound of the formula III with an ester represented by the formula IV.
Abstract:
Chromogenic or fluorescent carbapenems according to formula I, wherein Ar is a mono or disubstituted carbocyclic aromatic group or an optionally mono or disubstituted heterocyclic aromatic group, are useful compounds for the detection of bacterial carbapenemase.