摘要:
The degradation of steroid-C22-carboxylic acids to the C20-carbonyl steroids is carried out in simplified form and preferably without isolating intermediate reaction products by using 17(20)-steroid-22-carboxylic acids as starting material and directly transforming them into the 20-carbonyl compound through their respective acid halides by the Curtius degradation or by carboxy-inversion degradation. The acetyl substituent thus formed in C17 of the steroid compounds is present in the pharmacologically required configuration.
摘要:
A .DELTA..sup.1,4,17 -BNC compound having the formula: ##STR1## wherein X is a substituent selected from the group consisting of OH and OCH.sub.3 ; as well as its process of production by microbiological side-chain splitting of a 17-C-side-chain steroid with a defect mutant microorganism which gives a steroid with a 17-C-.alpha.-propionic acid substituent in the absence of inhibitors inhibiting either the cleavage of the steroid ring or microorganism growth, where the defect mutant microorganisms are grown under a reduced air supply whereby an enrichment of .DELTA..sup.1,4,17 -BNC occurs.
摘要:
A process for the production of useful steroids obtained by side chain degradation of sterol source materials through the use of microorganisms is described.
摘要:
For the production of 17-C-steroid-.alpha.-propionic acid compounds by microbial side chain degradation on 17-C-side chain steroid substrates wild strain microorganisms selected in predetermined manner are subjected to a multi-stage mutation and selection. The resultant mutant strains are capable of supplying the desired compounds, e.g. .DELTA.-4 BNC and/or .DELTA.-1,4 BNC in high yields even in the absence of inhibitors arresting the growth and/or degradation of the steroid ring. Wild strains and mutants particularly suitable, and their choice, production and use, are described.
摘要:
A proteolytic enzyme for use in detergent formulations having increased pH and oxidative stability under typical laundering conditions in aqueous solutions is produced by fermenting Bacillus licheniformis host strain transformed by a multicopy plasmid comprised of DNA sequences which code for the desired proteolytic enzyme.
摘要:
In the aerobic culture of microorganisms of the Xanthomonas genus in fermentation media, the use of water-in-oil emulsions in the media minimizes viscosity problems and enhances yields of Xanthomonas biopolymers. Preferably, the emulsion is formed with a surfactant and the microorganism is Xanthomonas campestris.
摘要:
This Stirling machine comprises a transfer piston (6, 6a) and a moving part (14) of a generator or of an electric motor, the transfer piston (6, 6a) periodically displacing a working gas between an expansion chamber (VE) and a compression chamber (Vc) which chambers are respectively associated with two working faces of the transfer piston (6, 6a) of which the cross-sectional area ratio ac/aE is >0.35 so that its displacement along an axis X oriented towards the expansion volume (VE) generates an in-phase working gas pressure component Px that opposes the displacement of the piston (6, 6a), so that all of the mechanical energy produced is transmitted to the moving part (14). This machine comprises a resonant second piston (10) coupled to the transfer piston (6, 6a) by a quantity of energy that is proportional to the pressure component Px.
摘要:
The invention relates to novel microbial 7α-hydroxysteroid dehydrogenase (7α-HSDH) knockout mutants and to the use thereof for producing other HSDHs having various functionalities, such as 3α-, 7β- or 12α-HSDH, and to the use of thus-produced HSDH enzymes in enzymatic reactions of cholic acid compounds, and in particular for producing ursodeoxycholic acid (UDCS). The invention relates in particular to novel methods for synthesizing UDCS.
摘要:
The present invention encompasses a process for preparing compounds of formula (1), wherein a compound of formula (2) is reacted in the presence of a catalyst and a solvent under hydrogen pressure to form a compound of formula (1) and wherein A and R1—R4 are defined herein.
摘要:
The present invention relates to a specific salt of a dihydropteridione derivative, namely the trihydrochloride salt of the compound N-[trans-4-[4-(cyclopropylmethyl)-1-piperazinyl]cyclohexyl]-4-[[(7R)-7-ethyl-5,6,7,8-tetrahydro-5-methyl-8-(1-methylethyl)-6-oxo-2-pteridinyl]amino]-3-methoxy-benzamide, to its crystallization in the form of an hydrate with water, to a process for the manufacture thereof, and to the use thereof in a pharmaceutical composition.