摘要:
In a process for preparing mevinolin by fermentation of a biomass in a fermentation liquor, which includes dissolving mevinolin from the biomass into the fermentation liquor, and separating the biomass from the fermentation liquor to obtain a separated fermentation liquor, separating the mevinolin from the separated fermentation liquor, and recovering the end product, the improvement which comprises carrying out the dissolving at a pH between about 7.5 and about 10, and the separating of the mevinolin is carried out at a pH between about 4.5 and about 1.
摘要:
The present invention relates to a new microbial process for the preparation of compound of formula (I) from a compound of general formula (II) wherein R stands for an alkali metal or ammonium ion, by the submerged culture of a strain which is able to 6β-hydroxylate the compound of formula (II) in aerobic fermentation and by the separation and purification of the product of formula (I) formed in the course of the biocoversion. The latter comprises the cultivation of a Micromonospora strain which is able to 6β-hydroxylate a compound of general formula (II)—wherein R is as defined above—at 25-32° C. on a nutrient medium containing available carbon—and nitrogen sources and mineral salts, thereafter feeding the substrate to be transformed into the developing culture, then hydroxilating the substrate until finishing of the bioconversion, then separating the compound of formula (I) from the culture broth and, if desired, purifying the same.
摘要:
The method of the invention is advantageously applicable to realize a multistage chemical process during which liquid clarifiers suitable for the purification of water and sewage, furthermore, fine-disperse pulverulent solid products utilizable as pait pigments and fillers may be recovered. Each final product of the multistage chemical processes is a useful material, so the whole technology is waste free.
摘要:
Novel thiazole derivatives of the formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen or methyl, R.sub.3 is oxo, hydroxyl or acetoxy, have prostaglandin side chains and have an action that is more selective than that of natural prostaglandins. They inhibit the activity of enzymes inducing the decomposition of prostaglandins in the organism and thus they increase the endogenous level of prostaglandins. Various novel methods are provided for their production.
摘要:
Novel 6-amino-5.alpha.,19-cycloandrostane derivatives of formula I and their pharmaceutically acceptable addition salts ##STR1## wherein X denotes any of the groups of the formula =CH(OR), =CO or =C=N-OR.sub.1,Y denotes any of the groups of the formula =CO, =CH(OR.sub.1), =C=N-OR.sub.1, =C(OR.sub.1)-C.tbd.CH or ##STR2## wherein R denotes a hydrogen atom, a C.sub.1-4 alkyl group or a C.sub.2-5 acyl group, andR.sub.1 denotes a hydrogen atom, a straight-chained or branched C.sub.1-5 alkyl group, a straight-chained or branched C.sub.1-5 hydroxyalkyl group, a C.sub.3-8 cycloalkyl group, an allyl group, or a benzyl group, andR.sub.3 has the same meaning as R.sub.2 but if R.sub.2 is a sec. or tert. alkyl group or an alicyclic group, then R.sub.3 can only be a hydrogen atom; and if R.sub.2 is a benzyl group then R.sub.3 can only be a hydrogen atom or a primary alkyl group, furtherR.sub.2 and R.sub.3 may denote together with the adjcacent nitrogen atom a piperidine, a morpholine, or an N-methylpiperazine group. These compounds have exhibited an aldosterone-antagonistic effect on rats.
摘要翻译:式I的新型6-氨基-5α,19-环戊二烯衍生物及其药学上可接受的加成盐(I)其中X表示式= CH(OR),= CO或= C = N -OR1,Y表示式= CO,= CH(OR1),= C = N-OR1,= C(OR1)-C3ONDCH或者其中R表示氢原子,C1 -4-烷基或C 2-5酰基,R 1表示氢原子,直链或支链C 1-5烷基,直链或支链C 1-5羟基烷基,C 3-8环烷基, 烯丙基或苄基,R3与R2具有相同的含义,但如果R2为秒。 或叔。 烷基或脂环基,那么R 3只能是氢原子; 并且如果R 2是苄基,那么R 3只能是氢原子或伯烷基,R 2和R 3可以与相邻的氮原子一起表示哌啶,吗啉或N-甲基哌嗪基。 这些化合物对大鼠表现出醛固酮拮抗作用。
摘要:
The invention relates to new substituted dihydropyridine derivatives of the general formula (I), ##STR1## wherein R.sup.1 and R.sup.6 are as defined herein after, the racemic and optically active variants as well as mixtures thereof, furthermore the acid addition salts of these compounds, pharmaceutical compositions containing the same and a process for the preparation thereof.The compounds of the general formula (I) can be advantageously applied for the treatment of pathologically severe hypertensions, their toxicity is low and they possess an advantageous therapeutic index.
摘要:
The invention relates to new peptide-aldehydes and a process for the preparation thereof, furthermore to pharmaceutical compositions containing the same.According to a feature of the present invention there are provided new peptide-aldehyde derivatives corresponding to the general formula (I) ##STR1## wherein R.sub.1 represents hydrogen or C.sub.1-6 alkyl group,R.sub.2 stands for C.sub.1-6 alkyl group, furthermore R.sub.1 and R.sub.2 are linked to the amino group of the Xxx alpha-amino acid,Xxx represents a D-phenylalanine residue or a D-alpha-amino acid group having in the side chain a C.sub.1-4 alkyl group,Pro stands for L-proline residue,Yyy stands for L-, D- or DL-arginine residue andA represents an acid residue.The new peptide-aldehyde derivatives of the invention possess valuable anticoagulant activity.
摘要:
The invention relates to new 16-amino-prostaglandin derivatives of general formula I, ##STR1## wherein C-15 and C-16 may have either S or R configuration, Z stands for a hydrogen atom or a lower alkyl group, and their acid addition salts. These compounds can be prepared by removing the ester group and the p-nitrocarbobenzyloxy protective group of a 9.alpha., 11.alpha., 15-trihydroxy-16-p-nitrobenzyloxycarbonylamido-5-cis,13-trans-prostadienoic acid derivative of general formula XII--wherein C-15 and C-16 may have either S or R configuration and Z stands for a lower alkyl group--in an optional sequence with the limitation that in those compounds of general formula I where Z stands for a lower alkyl group solely the p-nitrocarbobenzyloxy group is removed, and the resulting product of general formula I is optionally converted with an organic or inorganic acid into a salt.The new prostaglandin derivatives of the invention have valuable therapeutical properties, and can be applied as abortive or oxytocic agents.
摘要:
The present invention relates to a new microbial process for the preparation of the compound formula (I) from a compound of general formula (II) wherein R stands for an alkali metal or ammonium ion, by the submerged cultivation of a mold strain able to 6&bgr;-hydroxylate a compound of the Formula (II) in aerobic fermentation and by the separation and purification of the product of Formula (I) formed in the course of the bioconversion. The process comprises cultivating a strain of Mortierella maculata filamentous mold species that is able to 6&bgr;-hydroxylate a compound of the general Formula (II), on a nutrient medium containing assimilable carbon and nitrogen sources and mineral salts and separating the product formed from the fermentation broth, then isolating the compound of formula (I) and purifying the same. Novel strains of Mortierella maculata are also disclosed.
摘要:
The invention relates to a novel process for the preparation of 17 .alpha.-hydroxy-20-oxopregnane derivatives of the general formula (I), ##STR1## wherein R.sub.1 means a hydroxy or an oxo group; andthe dotted lines optionally represent one or more additional valence bond(s), with the proviso that the dotted line in the 4-position and the dotted line in the 5-position cannot each simultaneously be an additional valence bond from steroids having 23,24-dinor-17(20)-dehydrocholan-22-oic -22-oic acid structure.According to the process of the invention a steroid derivative having 23,24-dinorcholan-22-oic acid structure, containing a double bond in 17(20)-position, is transformed to 17.alpha., 20-epoxy-23,24-dinorcholanoic acid, the latter is converted to a reactive acid derivative, which is then reacted with a salt-containing azide ion to yield a 17.alpha., 20-epoxy-23,24-dinorcholanoic acyl azide derivative and the azide obtained is reacted with a mineral or organic acid in an aqueous medium.