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JPH07116222B2 |
A process for preparing 21-desoxyprednisolone 17-esters of formula (IV) is disclosed. The process comprises reacting a prednisolone 17 alpha ,21-cyclic orthoester with an acid in a 40-60% lower alcohol solution to produce a prednisolone ...
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JPH07116218B2 |
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JPH07316189A |
PURPOSE: To efficiently obtain the subject new compound usable as a raw material for anti-hypertensive agents by oxidizing and then reducing the unsaturated lactone ring of digitoxigenin-3-acetate with a periodate in the presence of ruth...
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JPH07110875B2 |
Disclosed is a new process for producing finasteride which involves reacting the magnesium halide salt of 17β-carboalkoxy-4-aza-5α-androst-1-en-3-one with t-butylamino magnesium halide, present in at least a 2:1 molar ratio to the este...
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JPH07309891A |
PURPOSE: To efficiently obtain in high yield a cholestadienediol useful as e.g. an intermediate for synthesizing 1α,25-dihydroxyvitamin D3, by reaction under specified conditions of a compound prepared by reaction between each specific ...
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JPH07267985A |
PURPOSE: To simply obtain a tauroursodeoxycholic acid hydrate from an aqueous solution of tauroursodeoxycholic acid on an industrial scale at a low cost without using an organic solvent. CONSTITUTION: This method for producing a taurours...
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JPH0794400B2 |
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JPH07258284A |
PURPOSE: To obtain a new estrane derivative useful as a synthetic intermediate, etc., for steroid compounds having trifluoromethyl group at 13 position. CONSTITUTION: This compound is expressed by formula I (R1 to R3 each is H or a prote...
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JPH07258285A |
PURPOSE: To provide a method for separating a steroid having a double bond at the side chain, obtainable in high purity and yield and capable of effectively utilizing for synthesizing active type vitamin Ds. CONSTITUTION: This method for...
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JPH07252294A |
PURPOSE: To obtain a new compound excellent in water solubility, having antiallergic activity, anti-inflammatory activity and antioxidizing activity, etc., thus useful for preventing or treating allergic diseases, inflammatory diseases, ...
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JPH07233192A |
PURPOSE: To readily and efficiently produce an optically active 24,25- dihydroxysteroid through one step in high yield by conducting a high-selective asymmetric diol formation reaction of a specified cholesterol derivative through an oxi...
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JPH07233189A |
PURPOSE: To efficiently obtain 6,14α-dihydroxy-4-androstene-3,17-dione having androgen activity, inhibitory action on aromatase activity and inhibitory action on breast carcinoma cell growth by oxidizing a 3-alkoxy-14α- hydroxyandrosta...
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JPH07224087A |
PURPOSE: To obtain a new steroid derivative efficiently and stereoselectively synthesizable by synthetic organic chemical technique without the need for using natural substance-derived materials with problems such as concerning resource ...
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JPH0776231B2 |
Novel intermediates useful in the preparation of fluorophenoxyphenoxypropionates and derivatives thereof which possess herbicidal activity selectively in the presence of broadleaf crops.
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JPH07206893A |
PURPOSE: To efficiently obtain a 25-hydroxycholesterol useful as an intermediate for vitamin D for treating osteoporosis, from chemicals having neither toxicity nor danger by converting a hydrogen atom at the 25-position of a cholesterol...
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JPH0772194B2 |
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JPH07505618A |
Invented is an improved process for the preparation of substituted steroidal dienes.
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JPH07505369A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH0755960B2 |
New processes for preparing new steroid derivatives including ergosta-1,5,7,22-tetraen-3 beta -ol, 1 alpha -hydroxy-ergosteryl diacetate, etc. which are useful intermediates in the synthesis of 1 alpha -hydroxy vitamin D2. The processes ...
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JPH07505138A |
The invention provides an improved process for the preparation of a halogenated steroidal diene. The process involves the simultaneous transformation of the steroidal 3-one to 3-halo and 17-carboxylic acid to 17-carboxamide in a single r...
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JPH07505140A |
Invented is an improved process for the preparation of substituted steroidal dienes. Also invented are novel intermediates used in said process.
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JPH0749437B2 |
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JPH0749438B2 |
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JPH0749435B2 |
A process for production of a 1 alpha ,3 beta ,24-trihydroxy- DELTA <5>-steroid represented by the formula (II): wherein R1 and R2, independently, represent a hydrogen atom, or R1 and R2 together form a single bond, R3 represents an unsu...
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JPH0749436B2 |
A process for preparing 15-oxygenated sterols, such as 3 beta -hydroxy-5 alpha -cholest-8(14)-ene-15 one, comprising converting 7-dehydrocholesterol to 3 beta -benzoyloxycholesta-5,7-diene, converting the 3 beta -benzoyloxycholesta-5,7-d...
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JPH07504563A |
A method for extraction and removal of cholesterol from untreated liquid egg yolk with simultaneous production of cholesterol as a by-product. The removal of cholesterol from the untreated liquid egg yolk is achieved by the extraction of...
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JPH0745512B2 |
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JPH07126285A |
PURPOSE: To obtain a steroid derivative useful as a synthetic intermediate for hydroxyvitamin D derivatives in a short process in a high yield by reacting a specific carbaldehyde derivative with a methyl ketone in the presence of a basic...
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JPH0730111B2 |
A novel process for the preparation of a 16-imino-17-aza-steroid of the formula I wherein A is selected from the group consisting of hydrogen and tritium comprising reacting a compound of the formula II wherein A has the above definition...
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JPH0789863A |
PURPOSE: To provide a method for isolating and purifying ginsenoside-Re, capable of facilitating isolation and purification of ginsenoside-Re from medicinal plants and providing an antiarrhythmic agent consisting essentially of the above...
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JPH07503008A |
Invented is an improved process for the preparation of benzo esters and benzo acids. Also invented are novel intermediates used in said process.
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JPH07503025A |
Pharmaceutical compositions are provided for lowering the activity of HMG-CoA reductase and/or lowering serum cholesterol, comprising an amount effective to lower the activity of HMG-CoA reductase and/or lower serum cholesterol of a side...
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JPH0725790B2 |
New processes for preparing cholesta-1,5,7-trien-3-ol which is a key intermediate in the synthesis of 1 alpha -hydroxyvitamin D3. The processes utilize the steps of reacting cholesta-1,4,6-trien-3-one with isopropenyl acetate in the pres...
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JPH0725792B2 |
The invention relates to a new process for the introduction into steroids of a 17-side chain containing a 20-keto group under the simultaneous formation of an unsaturated bond between C16 and C17 by reaction of 17-(isocyano-sulfonylmethy...
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JPH0725791B2 |
A process for dehydrogenating a compound of the formula which comprises reacting the compound with a silylating agent in the presence of a quinone to introduce a DELTA <1> double bond. Novel intermediates are compounds of the formula whe...
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JPH0720938B2 |
This invention relates to a selective acylation process for the preparation of phenolic N-disubstituted carbamate esters of steroids, comprising reacting in an inert solvent an acylating agent being a carbamoyl halogenide, a 4-(tertiary ...
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JPH0717674B2 |
A novel single-pot trialkylsilyl trifluoromethanesulfonate (R3Si-OTf) mediated process produces derivatives of 4-aza 3-keto steroids at the alpha -methylenic carbon through electrophilic substitution. These derivatives are useful in the ...
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JPH0717673B2 |
The invention relates to 17-(isocyano-sulfonylmethylene)-steroids and a process for the preparation of these compounds from 17-oxo-steroids. Furthermore the invention relates to 17-formamido-sulfonylmethylene)-steroids, which compounds a...
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JPH0714959B2 |
A process for preparing compounds of the formula which comprises reacting an imidazolide of the formula with an amine of the formula NHR4R5 in the presence of a grinard reagent to form a compound of formula I or reacting an imidazolide o...
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JPH0710877B2 |
Known pregnane derivatives are prepared by esterificiation of known androstane derivatives to give new ester of Formula III (III) wherein in each case symbolizes a single bond or a double bond, n is 1 or 2, R1 is hydrogen or methyl, R2 i...
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JPH078206B2 |
The invention relates to a new process for the elimination of steroidal compounds which are contained in a substance of biological origin, by complexing using cyclodextrins.
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JPH0717997A |
PURPOSE: To provide taurocholanic acids useful in the treatment and prevention of cystic union in a high yield by reacting cholanic acids with acid chloride and reacting thus obtained intermediate mixed acid anhydride with taurine. CONST...
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JPH07500086A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH0699470B2 |
The invention relates to a new process for the preparation of 21-hydroxy-20-keto-steroids from 17-(isocyano-sulfonylmethylene)-steroids whereby simultaneously an unsaturated bond is introduced between C16 and C17. Furthermore the inventi...
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JPH0696591B2 |
This invention pertains to novel 3-substituted-aminomethyl-3-substituted-oxy-17a-methyl-17a-l
ower-alkyl -17a-aza-D-homo-5-alpha-androstane compounds useful as muscle relaxants, methods for preparing such compounds, and methods for admin...
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JPH0696592B2 |
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JPH0689023B2 |
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JPH0689021B2 |
Perchloryl fluoride when reacted with the appropriately protected 9 alpha -hydroxyandrostenedione stereoselectively produces the corresponding 6 beta -fluoro steroid.
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JPH0686477B2 |
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JPH0684398B2 |
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