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JPS5822160B2 |
Procedure for the preparation of 1-N-substituted derivatives of aminocyclitols, specifically 4,6-di-0- (aminoglycosyl) -1,3-diaminocyclitols sisomycin, verdamicin, tobramycin, gentamicin C1, gentamicin Cla, gentamicin C2, gentamicin C2a,...
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JPS5821617A |
PURPOSE: A low-toxicity immunoregulator that contains cyanocobalamin as an active ingredient, thus showing effect in prevention and remedy for infections and malignant tumors. CONSTITUTION: The objective immunoregulator contains cyanocob...
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JPS57159798A |
The two ligands of these complexes are amino sugars, or amino acids associated with mono- or oligosaccharides. The invention furthermore relates to medicaments containing these complexes as active substances.
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JPS5745757B2 |
Trialkyl boranes are reacted with compounds containing protons in the presence of catalytic amounts of carboxylic acid derivatives, especially derivatives of t-alkyl carboxylic acids, thereby highly increasing the rate of protolyses of t...
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JPS5729480B2 |
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JPS5791739A |
PURPOSE: To purify and separate vitamin B12 with excellent purity industrially in an excellent yield by treating a vitamin B12 containing solution containing impurities with a specific copolymer resin having a surface area of a definite ...
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JPS5727119B2 |
1419933 Methylcobalamine L'OPOCHIMIE 1 Aug 1974 [8 Aug 1973] 34008/74 Addition to 1355899 Heading C2V Methylcobalamine is prepared by the simultaneous reduction and methylation of cyanocobalamine in an aqueous methanolic solution contain...
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JPS5727087B2 |
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JPS5721277B2 |
1-N-[ omega -amino- alpha -hydroxyalkanoyl] kanamycins A and B of the formula I in which R represents OH or NH2, are prepared by acylation of polysilylated kanamycin A or B, or polysilylated kanamycin A or B which has a protective group ...
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JPS574638B2 |
A process for the separation and/or purification of oligo- and polyhydroxy compounds by introducing and subsequently eliminating protective groups, wherein oligo- and polyhydroxy compounds are reacted with bis(ethyl-pivaloyloxy)-diboroxa...
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JPS572673B2 |
Novel metal salts of boric acid esters of saccharides have been found to be extremely useful for imparting a high oxidation-resistance to carbonaceous materials. The metal salts of the boric acid esters according to the present invention...
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JPS5653352B2 |
Vitamin B12 is obtained from novel actinomycetes of the genus Pseudonocardia which have the ability to assimilate methanol. Cells of these actinomycetes and vitamin B12 are obtained by cultivating them in a culture medium containing meth...
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JPS56139475A |
A process for synthesizing N-benzoyl-L-ristosamine is disclosed. Intermediates useful for synthesizing N-benzoyl-L-ristosamine, and processes for preparing such intermediates, are also disclosed.
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JPS56139476A |
A process for synthesizing daunosamine hydrochloride is disclosed. Intermediates useful for synthesizing daunosamine hydrochloride, and processes for preparing such intermediates, are also disclosed.
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JPS56133299A |
Modified inorganic polymers represented by the formula wherein P/ &cir& is an inorganic polymer linked to the 3 min or 5 min -0- of the nucleoside through a base hydrolyzable covalent bond; R is H or a blocking group; R1 is a hydrocarbyl...
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JPS56108799A |
A zinc complex of lysocellin is provided. The complex acts as a coccidiostat and growth-promoting agent when administered to poultry.
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JPS5549586B2 |
Procedure for the preparation of 1-N-substituted derivatives of aminocyclitols, specifically 4,6-di-0- (aminoglycosyl) -1,3-diaminocyclitols sisomycin, verdamicin, tobramycin, gentamicin C1, gentamicin Cla, gentamicin C2, gentamicin C2a,...
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JPS55144893A |
A process for producing red metal corrinoids comprising reacting yellow metal-free corrinoids having main absorptions lambda max of 480 and 290 nm, in a liquid medium, with complex-forming metal ions to give yellow metal corrinoids, and ...
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JPS5543446B2 |
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JPS5533416B2 |
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JPS55500336A |
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JPS5543095A |
The invention relates to selectively protected 4,6-di-O-(aminoglycosyl)-1,3-diamino cyclitols (and methods for their preparation) useful as intermediates for the synthesis of antibiotics, such as those of the sisomycin type.
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JPS54157600A |
Radiolabeled vitamin B12 derivatives having the formula wherein R is hydrogen or alkyl of 1 to 3 carbon atoms; n is 0, 1, 2, 3 or 4; and the asterisk (*) indicates tagging with a radioisotope, are useful as tracers in radioassays.
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JPS5365900A |
Novel monoesters of cobamide derivatives of coenzyme B12 of the formula: I wherein R is acyl of an organic carboxylic acid of 4 to 20 carbon atoms and Co is alpha -(5,6-dimethyl-benzimidazolyl)-cobamide which is a mixture of the said mon...
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JPS5331627A |
PURPOSE: Zinc compounds of β-D-glucopyranosides of formula I (R is H, acetyl; A is O, S; Y is O, - NH -; n is 0,1 - 5), e.g. zinc-bis(thioglucose).
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JPS531810B2 |
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JPS535197A |
9-(3-O-Acyl- beta -D-arabinofuranosyl)adenine compounds, 9-(2,3-di-O-acyl- beta -D-arabinofuranosyl)adenine compounds, and their production by reacting in each case the corresponding 5-silyl ether derivative with a tetraalkylammonium flu...
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JPS5248981B1 |
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JPS52148013A |
Diaminoalditol derivs. (I) and diaminoalditol (II) and their acid addition salts are novel cpds. (where R = H or 1-12C alkanoyl). (I) are antibiotics active against gram-positive and gram-negative bacteria when administered parenterally ...
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JPS52144630A |
The pesticidal composition contains a stannic derivative of the saccharose of the formula below where sacch. represents a saccharose residue, X represents an ortho-phenylene, ethylene or vinylene radical, m represents 0 or 1, p represent...
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JPS5230310B2 |
A vitamin B12 derivative of prolonged activity is produced by reacting dextran with cyanogen bromide and treating the product with cobamamide.
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JPS5224040B2 |
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JPS5154916A |
Ethylenediamineplatinum(II) 2,4-dioxopyrimidine complexes are characterized by high anti-tumor activity and low mammalian toxicity.
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JPS51120B2 |
1355899 Methylcobalamine L'OPOCHIMIE 1 Nov 1972 [10 Nov 1971] 50324/72 Heading C2V Methylcobalamine is prepared by reduction and methylation of hydroxocobalamine carried out simultaneously in an aqueous alcoholic solution through the act...
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JPS5038120B1 |
1305157 Cobamide derivatives ROUSSELUCLAF 6 Oct 1971 [6 Oct 1970] 46568/71 Heading C2V Cobamide compounds in which there is bonded directly to the cobalt atom an alkyl group which may be substituted by an aryl, hydroxyl or carboxyl group...
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JPS50111287A |
The invention relates to a method for increasing the vitamin B12 production of fermentation processes performed in a known way with a mixed population of mesophilic methane-producing bacteria under anaerobic conditions. According to the ...
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JPS50101515A |
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JPS5020053B1 |
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JPS4922712B1 |
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JPS4917280B1 |
1315969 Removing cyanide ions from solutions of cobalt corrinoids GLAXO LABORATORIES Ltd 30 Nov 1970 [1 Dec 1969] 58631/69 Heading C2V Free cyanide ions occurring in alkaline solutions of cobalt (I) corrinoids formed by reduction of corr...
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JPS4916957B1 |
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JPS4915796B1 |
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JPS4930523A |
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JPS4918896A |
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JPS4843853B1 |
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JPS4838880B1 |
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JPS4875600A |
Hydroxocobalticorrinoids such as hydroxocobalamin are prepared by reaction under non-oxidising conditions and in the absence of light of a cobalt(I) corrinoid with an alkylating agent to introduce at the cobalt atom of the corrinoid a st...
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JPS4828440B1 |
1,191,407. Cobalamine derivatives. FARBENFABRIKEN BAYER A.G. 11 Oct., 1968 [14 Oct., 1967], No. 48323/68. Heading C2V. The invention comprises alkylsulphonyl - cobalamines in which the alkyl groups contain up to 8 carbon atoms. The compo...
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JPS4750397B1 |
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JPS4538059B1 |
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