摘要:
(.+-.)4-demethoxy-6(and-11-)-deoxydaunomycinone which are starting materials for anthracycline antitumor antibiotics are prepared by reacting 1,2,3,6-tetrahydrophthalic anhydride with an alcohol of the formula ROH, wherein R is lower alkyl, substituted lower alkyl or aryl to form a monoester, subjecting the monoester to a Friedel-Crafts reaction with acetyl chloride, followed by mild alkaline treatment, to give the corresponding .alpha.,.beta. unsaturated ketone, catalytically reducing same to form the corresponding 4-acetyl-perhydrophthalate reacting the latter with 1,4-dimethoxynaphthalone in the presence of tritluoroacetic anhydride and trifluoroacetic acid to form a mixture of two isomeric compounds, submitting said mixture of isomers to a catalytic reduction of the benzylic carbonyl function, followed by treatment thereof with sulphuric acid at room temperature to afford a mixture of tetracyclic isomers, treating the mixture of tetracyclic isomers with sulphuric acid at 80.degree. C. for one hour to give a 1:1 mixture of the racemic anthracyclinones above mentioned.
摘要:
Daunorubicin (also known as daunomycin) derivatives of the formula ##STR1## wherein X is ##STR2## and R is --COCF.sub.3 or H which are prepared by hydrogenating 9-desacetyl-9-keto-N-trifluoroacetyldaunorubicin, an unexpectedly stable key-intermediate which is itself a new compound, are useful in treating certain mammalian tumors.
摘要:
A new process for the preparation of 6-deoxyanthracyclinones of general formula I: ##STR1## wherein R represents a hydrogen atom, a hydroxy group or a lower alkoxy group is described. The process provides a total synthesis of the 6-deoxyanthracyclinones of formula I using 1,2,3,6-tetrahydro-phthalate as starting material. The obtained racemic mixture of the compounds of formula I, if desired, can be submitted to optical resolution by the conventional method of conversion to diastereomeric derivatives using a chiral resolving agent. Alternatively, the racemic mixture can be used as such for the condensation with a suitably protected halosugar derivative to obtain alpha glycosidic derivatives of formula XV: ##STR2## wherein R.sub.1 represents a hydrogen atom or a hydroxy group, one of R.sub.2 and R.sub.3 represents a hydrogen atom, the other of R.sub.2 and R.sub.3 represents a hydrogen atom or a hydroxy group and X is a hydrogen atom or a trifluoro acetyl group. The N-trifluoroacetyl 7S:9S and 7R:9R derivatives of the .alpha.-glycosides of formula XV can be separated by chromatography on silica gel to obtain, after mild alkaline hydrolisis the wanted 7S:9S .alpha.-glycosides (R.sub.1 =H) as free bases and can eventually be transformed into their corresponding doxorubicin derivatives (R.sub.1 =OH) by known procedures.
摘要:
Anthracycline glycosides of the formula (I) ##STR1## wherein one of R.sub.1 and R.sub.2 is hydrogen and the other of R.sub.1 and R.sub.2 is hydroxy, each of R.sub.3, R.sub.4 and R.sub.5 is independently selected from the group consisting of hydrogen and hydroxy and X is hydrogen or trifluoroacetyl, with the provisos that R.sub.4 and R.sub.5 are not simultaneously hydroxy and that if R.sub.3 is hydroxy, then X is hydrogen, which are useful in treating certain mammalian tumors are prepared by condensing an aglycone of the formula (II) ##STR2## wherein R.sub.1 and R.sub.2 are defined as above, with a suitable protected halosugar, after which the protecting groups are removed.
摘要:
Disclosed are new antitumor compounds of the formula: ##STR1## wherein R is hydrogen or trifluoroacetyl and the hydrochlorides thereof and a process for making same. Also disclosed is a novel intermediate (9-desacetyl-9-formyl-N-trifluoroacetyldaunorubicin) used in the process.
摘要:
Anthracycline glycosides of the formula (I) ##STR1## wherein one of R.sub.1 and R.sub.2 is hydrogen and the other of R.sub.1 and R.sub.2 is hydroxy, each of R.sub.3, R.sub.4 and R.sub.5 is independently selected from the group consisting of hydrogen and hydroxy and X is hydrogen or trifluoroacetyl, with the provisos that R.sub.4 and R.sub.5 are not simultaneously hydroxy and that if R.sub.3 is hydroxy, then X is hydrogen, which are useful in treating certain mammalian tumors are prepared by condensing an aglycone of the formula (II) ##STR2## wherein R.sub.1 and R.sub.2 are defined as above, with a suitable protected halosugar, after which the protecting groups are removed.
摘要:
Compounds having the formula: ##STR1## wherein (a) whenR.sup.1 is --COCH.sub.3 or --COCH.sub.2 OH,R.sup.2 is --OH, R.sup.3 is --OCH.sub.3 and R.sup.4 is --H;(b) whenR.sup.2 is --COCH.sub.3 or --COCH.sub.2 OH;R.sup.1 is --OH, R.sup.3 is --H and R.sup.4 is --OCH.sub.3 ;and which are useful in treating certain mammalian tumors, are prepared from 9,10-anhydro-N-trifluoroacetyl daunorubicin, a known compound. The invention described herein was made in the course of work under a grant from the United States Department of Health, Education and Welfare.
摘要:
Anthracycline glycosides useful as antitumor agents of formula XV: ##STR1## wherein R.sub.1 represents a hydrogen atom or a hydroxy group, one of R.sub.2 and R.sub.3 represents a hydrogen atom, the other of R.sub.2 and R.sub.3 represents a hydrogen atom or a hydroxy group and X is a hydrogen atom or a trifluoro acetyl group.
摘要:
Compounds having the formula: ##STR1## wherein (a) when R.sup.1 is --COCH.sub.3 or --COCH.sub.2 OH, R.sup.2 is --OH, R.sup.3 is --OCH.sub.3 and R.sup.4 is --H;(b) when R.sup.2 is --COCH.sub.3 or --COCH.sub.2 OH; R.sup.1 is --OH, R.sup.3 is --H and R.sup.4 is --OCH.sub.3 ;and which are useful in treating certain mammalian tumors, are prepared from 9,10-anhydro-N-trifluoroacetyl daunorubicin, a known compound.