Abstract: The invention relates to a method for preparing caprolactam comprising recovering a mixture containing 6-aminocaproic acid, from a culture medium comprising biomass, and thereafter cyclising the 6-aminocaproic acid in the presence of superheated steam, thereby forming caprolactam, wherein the weight to weight ratio carbohydrate to 6-aminocaproic acid in said mixture is 0.03 or less.

Abstract: The present invention relates to the hemi sulfuric acid salt of methyl (R)-2-amino-2-(cyclohexa-1,4-dien-1-yl)acetate, also trivially referred to as the hemi sulfuric acid salt of D-dihydrophenylglycine methyl ester, to a method for the preparation of said salt and to the use of said salt in the enzymatic synthesis of antibiotics.

Abstract: The present invention relates to the hemi sulfuric acid salt of D-phenylglycine methyl ester, to a method for the preparation of said salt and to the use of said salt in the enzymatic synthesis of antibiotics and of D-phenylglycine methyl ester free base.

Abstract: The invention relates to a method for preparing caprolactam comprising recovering a mixture containing 6-aminocaproic acid, from a culture medium comprising biomass, and thereafter cyclising the 6-aminocaproic acid in the presence of superheated steam, thereby forming caprolactam, wherein the weight to weight ratio carbohydrate to 6-aminocaproic acid in said mixture is 0.03 or less.

Abstract: The present invention relates to a method for preparing cyclopeptides by means of protection with a substituted boronic acid. The present invention also discloses novel boronate esters of cyclopeptides of general formula (8).

Abstract: The present invention relates to a mutant prokaryotic penicillin G acylase derived from a wild-type penicillin G acylase characterized in that the mutant is having an amino acid substitution at one or more amino acid positions selected from the group consisting of amino acid positions A3, A77, A90, A144 A192, B24, B109, B148, B313, B460 and B488 according to the amino acid numbering of the Escherichia coli penicillin G acylase having the amino acid sequence depicted in SEQ ID No: 1.

Abstract: The present invention describes a process for the synthesis of a semi-synthetic ?-lactam compound from a nucleus and a side chain selected from the group consisting of D-phenylglycine and D-dihydro-phenylglycine in the form of a side chain ester and an enzyme catalyzing the coupling of the side chain ester to the nucleus characterized in that the side chain ester is not isolated as a solid intermediate.

Abstract: The invention relates to a method for preparing caprolactam comprising recovering a mixture containing 6-aminocaproic acid, from a culture medium comprising biomass, and thereafter cyclising the 6-aminocaproic acid in the presence of superheated steam, thereby forming caprolactam, wherein the weight to weight ratio carbohydrate to 6-aminocaproic acid in said mixture is 0.03 or less.

Abstract: The present invention relates to a method for preparing cyclopeptides by means of protection with a substituted boronic acid. The present invention also discloses novel boronate esters of cyclopeptides of general formula (8).

Abstract: The present invention relates to a mutant prokaryotic penicillin G acylase derived from a wild-type penicillin G acylase characterized in that the mutant is having an amino acid substitution at one or more amino acid positions selected from the group consisting of amino acid positions A3, A77, A90, A144 A192, B24, B109, B148, B313, B460 and B488 according to the amino acid numbering of the Escherichia coli penicillin G acylase having the amino acid sequence depicted in SEQ ID No: 1.

Abstract: The present invention describes a process for the synthesis of a semi-synthetic ?-lactam compound from a nucleus and a side chain selected from the group consisting of D-phenylglycine and D-dihydro-phenylglycine in the form of a side chain ester and an enzyme catalyzing the coupling of the side chain ester to the nucleus characterized in that the side chain ester is not isolated as a solid intermediate.

Abstract: The present invention relates to a process for preparation of a pharmaceutically acceptable metal salt of clavulanic acid comprising the steps of (a) fermenting of a microorganism capable of producing and excreting the clavulanic acid into the broth; (b) removing biomass and other solid material from the clavulanic acid containing fermentation broth obtained in step (a); (c) acidifying the solution obtained after step (b) to a pH between 1 and 3 and extracting the acidified solution with a partly or fully water-immiscible solvent and separating the clavulanic acid containing extract; (d) mixing the clavulanic acid containing extract obtained in step (c) with a metal donor and at least one additional cosolvent to result in an insoluble, preferably crystalline metal clavulanate salt with a yield of at least 80%; and (e) separating the insoluble, preferably crystalline, metal clavulanate salt from the mixture obtained in step (d).

Abstract: The invention relates to crystalline amoxicillin trihydrate powder having a bulk density higher than 0.45 g/ml. The invention also relates to a process for preparing crystalline amoxicillin trihydrate powder, said process comprising: crystallizing amoxicillin trihydrate from a solution containing dissolved amoxicillin; separating the crystals from said solution; and drying the separated crystals, resulting in crystalline powder having a bulk density higher than 0.45 g/ml.

Abstract: The invention relates to crystalline amoxicillin trihydrate powder having a bulk density higher than 0.45 g/ml. The invention also relates to a process for preparing crystalline amoxicillin trihydrate powder, said process comprising: crystallizing amoxicillin trihydrate from a solution containing dissolved amoxicillin; separating the crystals from said solution; and drying the separated crystals, resulting in crystalline powder having a bulk density higher than 0.45 g/ml.

Abstract: The invention relates to a process for the preparation of an aqueous solution or suspension of a &bgr;-lactam nucleus and application thereof. The aqueous solution or suspension of the &bgr;-lactam nucleus is prepared by process wherein an enzymatic deacylation of a &bgr;-lactam compound, which compounds comprises a &bgr;-lactam nucleus with a side chain coupled to it via an amide bond and which deacylation reaction is carried out in a mixture of water and an organic solvent and which deacylation leads to a &bgr;-lactam nucleus and a carboxylic acid, is carried out at a pH value of between 2 and 6 so that the carboxylic acid is extracted in situ to the organic solvent.

Abstract: The invention relates to a method for preparing a &bgr;-lactam antibiotic, wherein an N-substituted &bgr;-lactam, having general formula (I), wherein R0 is hydrogen or C1-3 alkoxy; Y is CH2, oxygen, sulfur, or an oxidized form of sulfur; Z is (a), (b), (c) or (d), wherein R1 is hydrogen, hydroxy, halogen, C1-3 alkoxy, optionally substituted, optionally containing one or more heteroatoms, saturated or unsaturated, branched or straight C1-5 alkyl, preferably methyl, optionally substituted, optionally containing one or more heteroatoms C5-8 cycloalkyl, optionally substituted aryl or heteroaryl, or optionally substituted benzyl; and X is (CH2)m-A-(CH2)n, wherein m and n are the same or different and are chosen from the group of integers 0, 1, 2, 3 or 4 and A is CH═CH, C═C, CHB, C═O, optionally substituted nitrogen, oxygen, sulfur or an optionally oxidized form of sulfur, and B is hydrogen, halogen, hydroxy, C1-3 alkoxy, or optionally substituted methyl, or a salt thereof, is contacted with at least

Abstract: A process to prepare the E isomer of a 3-substituted (6R,7R)-7-phenyl-acetamido-ceph-3-em-4-carboxylic acid from a mixture of the E and Z-isomer of either the corresponding tert-butyl or the corresponding 4-methoxybenzyl ester of a 3-substituted (6R,7R)-7-phenylacetamido-ceph-3-em-4-carboxylate, characterized by the application of a compound selected from the group titanium tetrachloride, tin tetrachloride and tellurium tetrachloride.

Abstract: An efficient process for de-esterification has been provided for by application of special tetrahalogenides. By applying this process a new compound, viz. cefesone, and especially the E-isomer thereof, has been prepared.

Abstract: Bis[di(alkoxyphenyl)phosphino]alkanes are produced by reacting an alkoxyphenyl Grignard with phosphorus trichloride and converting the resulting di(alkoxyphenyl)phosphorus chloride to the corresponding phosphine. The di(alkoxyphenyl)phosphine is reacted with a dihaloalkane to produce the desired bisphosphine.