cas 3115-55-7, 6-AMINO-3,3-DIMETHYL-7-OXO-4-THIA-1-AZA-BICYCLO[3.2.0]HEPTANE-2-CARBOXYL

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Articles about 3115-55-7Total 10 be found

Enzymatic hydrolysis of β-lactam antibiotics at low pH in a two-phase "aqueous solution - Water-immiscible organic solvent" system
The application of the two-phase "aqueous solution - water-immiscible organic solvent" system is suggested not for effective biocatalytic synthesis, but for hydrolytic purposes. Enzymatic hydrolysis of benzylpenicillin and N-phenylacetamidodesacetoxycepha
Chilov, Ghermes G.,Svedas, Vytas K.
p. 699 - 707
(2007/10/03)

Deacylation of amides
De-acylation of Penicillins and Cephalosporins to obtain the corresponding 6-aminopenicillanic acid or 7-aminocephalosporanic acid by the imino halide/imino ether process using long chain bases.
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(2008/06/13)

β-Lactam antibiotic esterification process using methoxymethyl methane sulfonate
Disclosed is an improved process for esterifying carboxylic acids, particularly 3-carboxylic acid groups of penicillins and 4-carboxylic acid groups of cephalosporins, to form methoxymethyl esters. Replacement according to the present process of the conventional halomethyl methyl ether esterifying agent with methoxymethyl mesylate avoids the carcinogenicity problem of the prior art reagent while still giving good yields of high quality product.
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(2008/06/13)

Process for producing 6-aminopenicillanic acid or 7-aminocephalosporanic acid derivatives
A derivative of 6-aminopenicillanic acid or 7-aminocephalosporanic acid is produced by a process which comprises disulfidizing a 6-thioacylaminopenicillanic acid or 7-thioacylaminocephalosporanic acid compound to obtain a corresponding disulfide compound, and then solvolyzing the disulfide compound. The process is novel and industrially feasible for producing the amino compound, which is not accompanied by "reconversion reaction".
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(2008/06/13)

Novel penicillins and cephalosporins and process for producing the same
Novel penicillins and cephalosporins and non-toxic salts thereof, which contain a mono- or di-oxo- or thioxo-piperazino(thio)carbonylamino group have been prepared. These compounds are valuable antibacterial compounds for use in mammals including man. A process for the preparation of the compounds has also been discovered.
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(2008/06/13)

Process for production of 6-aminopenicillanic acid or 7-aminocephalosporanic acid derivatives
A derivative of 6-aminopenicillanic acid or 7-aminocephalosporanic acid is produced by a process which comprises chlorinating or brominating a 6-thioacylaminopenicillanic acid or 7-thioacylaminocephalosporanic acid compound to obtain a corresponding iminothiohalide compound, and then solvolyzing the iminothiohalide compound. The process is novel and industrially feasible for producing the amino compound, which is not accompanied by "reconversion reaction".
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(2008/06/13)

Immobilized microbial cells
Immobilized microbial cells are prepared by treating microbial cells with a polyfunctional cross-linking reagent and contacting the treated cells in aqueous medium with a water insoluble particulate polymer prepared by polymerizing an ethylenically unsaturated monomer. Alternatively, the treated cells may be bonded to the monomer prior to polymerizing.
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(2008/06/13)

Process for the manufacture of aminoazetidinones
The present invention relates to a new process for the preparation of 6-aminopenicillanic acid and 7-amino-cephalosporanic acid derivatives by treating the corresponding acylamino derivatives with phosphinic acid chlorides, reacting the mixed acid anhydrides so obtained with agents forming imidohalides, converting the imido halides into iminoethers and hydrolysing them.
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(2008/06/13)

1-Oxides of Schiff bases of 6-aminopenicillanic acid
Compounds containing a cephem nucleus are prepared by heating a 1-oxide of a Schiff base of 6-aminopenicillanic acid. These cephem compounds are useful as intermediates in the preparation of physiologically active cephalosporins.
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(2008/06/13)