摘要:
Cardiotonic cardenolide derivatives of the formula ##STR1## wherein n, m, R.sub.1 to R.sub.9 are as hereinafter defined, the mineral or organic salts thereof and a process for their preparation.
摘要:
Enzyme conjugates are prepared of cardiac glycosides and aglycones for use in homogeneous enzyme immunoassays. The conjugates retain a substantial degree of the original activity of the enzyme and upon binding of receptor to the steroid moiety, a substantial diminution of enzyme activity is obtained. Various linking groups are employed for linking the steroid portion of the molecule to the enzyme, such as non-oxo carbonyl groups.
摘要:
Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen or carboxylic acyl, particularly acetyl, benzoyl or p-nitro-benzoyl; the compounds are useful as cardiotonics.
摘要:
The derivatives of digoxin useful in the radioimmunoassay of digoxin having the following formulae: ##STR1## where R is a carboxylic acid ester. These derivatives are formed by the following process: (1) reacting the carboxylic acid in the presence of trifluoroacetic anhydride with a solution of digoxin in an inert, nonaqueous solvent medium, (2) adding water so as to form the above derivatives, (3) purifying the above derivatives from other constituents of the reaction mixture and (4) radio-labeling these derivatives for use as a labeled hapten in the radioimmunoassay of digoxin.The preferred carboxylic acids are imidazoleacetic acid and p-hydroxyphenylpropionic acid. The preferred radioactive isotope is .sup.125 I.
摘要:
Tetra.sup.125 Iodo-di-tyramine of digitalis derivatives having the formula: ##STR1## wherein R is hydrogen or hydroxyl; and process for producing the same.
摘要:
The preparation and valuable biological properties - especially diuretic activity - of 6.beta.,17-dihydroxy-7.alpha.-(lower alkoxy)carbonyl-3-oxo-17.alpha.-pregn-4-ene-21-carboxylic acid .gamma.-lactones and the corresponding hydroxy acids and salts thereof are disclosed.
摘要:
The anti-DCA activity of 6 Alpha -carboxymethyl-17-hydroxy-3oxo-17 Alpha -pregn-4-ene-21-carboxylic acid gamma -lactone and its preparation are disclosed.
摘要:
The invention relates to 3'', 4''-anhydro- Beta , Ltalomethylosides of the general formula I
wherein R1 is methyl or formyl and R2 stands for Beta -H or Beta -OH, if there is no double bond in 4,5-position, and R3 is a butenolide or cumalin ring, a process for preparing them and their use in the treatment of cardiac and circulatory disturbances. The compounds are especially suitable for treating cardiac insufficiency, tachycardia and conduction defects.
摘要:
The present invention relates to an improved process for the manufacture of Beta -(3-oxo-7 Alpha -thioacyl-17 Beta -hydroxy4-androstene-17 Alpha -yl)-propionic acid gamma -lactones in which a Beta -(3-oxo-17 Beta -hydroxy-4,6-androstadiene-17 gamma -yl)-propionaldehyde cyclohemiacetal alkyl glycoside is reacted with a thiocarboxylic acid in a mixture of water and an organic solvent miscible with water to yield a 3-(3''-oxo-7 Alpha ''thioacyl-17 Beta ''-hydroxy-4''-androstene-17 Alpha ''-yl)propionaldehyde cyclohemiacetal alkyl glycoside and in which the compound thus obtained is oxidized in an acid solution, the alkyl glycoside radical in the cyclohemiacetal group being split off, to yield the corresponding gamma -lactone; the invention further relates to new intermediates useful in this process and having the formula
IN WHICH R1 stands for the methyl group or a hydrogen atom and R2 and R3 each for an alkyl group having 1 to 5 carbon atoms.
摘要:
The present application relates to a process for the preparation of glycosides of the general formula I
wherein R1 is a glycoside residue which may be substituted, R2 is an aldehyde or methyl group, R3, R4 and R5 are each a hydrogen atom or a hydroxyl group, R6 is a butenolide or an Alpha -pyrone ring, in which a steroid aglycone of the general formula II
wherein R2, R3 and R6 have the above meanings, and R4 as well as R5 represents a hydrogen atom, a hydroxyl group or a lower acyloxy group is reacted with an O-acylglycosyl halide in an inert solvent, in the presence of heavy metal salts of the elements of group Ib or IIb of the periodic table dispersed on celite, removing the reaction water formed by means of azeotropic distillation, and saponifying the acylated glycosides thus obtained. Compounds obtained by this process possess cardiotonic properties.