Lonza Inc.

Andreas Tschech

Andreas Kiener

Klaus Heinzmann

Andreas Tinschert

Sabine Schurr

A new microbiological process for the production of hydroxy-nitrogen-heterocyclic-carboxylic acids or their soluble salts of the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each is a hydrogen atom, a halogen atom or a C.sub.1 -C.sub.4 alkyl group and X is a nitrogen atom or a CR.sub.3 function, wherein R.sub.3 is a hydrogen atom or a halogen atom, starting from the corresponding nitrogen-heterocyclic-carboxylic acids, as well as new microorganisms suitable for use in the process.

Microbiological process for hydroxylation of

Disclosed is a microbiological process which utilizes a biologically pure culture of Sphingomonas sp. DSM 7007 in order to produce a malonyl-7-aminocephalosporanic acid derivative product. Furthermore the process uses cephalosporin C derivative as a substrate for the conversion of the cephalosporin C into the product. The process takes place by one time or continuous addition of substrate so that the concentration of cephalosporin C does not exceed 20 percent by weight. Furthermore, the process is performed at a temperature range of 0-60 degrees celsius and a pH range of 5 to 9.

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Aarau, Switzerland

Andreas Tschech