摘要:
Starting from the known 4'-deoxy-4'-iodo-N-trifluoroacetyldaunorubicin, two new anthracycline glycosidic antibiotics, the 4'-deoxy-4'-iodo-daunorubicin and 4'-deoxy-4'-iodo-doxorubicin, have been prepared by known procedures. Both the new glycosides have been found to be endowed with outstanding antitumoral activity.
摘要:
Novel antitumor anthracycline glycosides are prepared by condensing daunomycinone with 2,3,4,6-tetradeoxy-4-C-methylene-3-trifluoroacetamido-L-threo-hexopyranosyl chloride; 2,3,4,6-tetradeoxy-4-C-methylene-3-trifluoroacetamido-L-arabino-hexopyranosyl chloride or 2,3,6-trideoxy-4-C-trifluoroacetamidomethyl-3-trifluoroacetamido-3-O-trifluoroacetyl-L-lyxo-hexopyranosyl chloride.
摘要:
Anthracycline glycosides of the formula I ##STR1## wherein R is hydrogen or hydroxy, one of R.sub.1 and R.sub.2 is methyl and the other of R.sub.1 and R.sub.2 is hydroxy, and pharmaceutically acceptable acid addition salts thereof, which are useful in treating certain mammalian tumors, are prepared by condensing daunomycinone with certain novel sugars in an inert organic solvent and in the presence of a soluble silver salt and a dehydrating agent to form the corresponding protected glycosides from which the protecting groups are removed. This gives the compounds wherein R is hydrogen. The former are converted to the corresponding hydroxyl compounds by treatment with bromine and sodium formate.
摘要:
Racemic anthracyclinones of the general formula II ##STR1## when condensed with 2,3,6-trideoxy-3-trifluoroacetamido-4-0-trifluoroacetyl-.alpha.-L-lyxo-pyranosyl chloride in the presence of silver trifluoromethane sulphonate yield an easily separable mixture of equimolar amounts of exclusively the .alpha.-glycoside of the 7S : 9S diastereomer and the .beta.-glycoside of the 7R : 9R diastereomer. In this way the biologically important .alpha.-glycosides of the 7S : 9S diastereomer of the general formula I (below) are easily prepared from a racemic anthracyclinone.
摘要:
The novel compounds, 4'-deoxy-daunomycin and 4'-deoxy-adriamycin, as well as derivatives thereof are useful as anti-tumor antibiotics. These compounds are prepared by condensing the corresponding aglycone with a novel trifluoracetyl protected reactive halo sugar which is 2,3,4,6-tetradeoxy-3-trifluoroacetamido-L-threo-hexopyranosyl chloride.
摘要:
[14-.sup.14 C]-daunorubicin and doxorubicin are prepared by reacting 9-desacetyl-9-formyl-N-trifluoroacetyl daunorubicin with [.sup.14 C]-diazomethane to form [14-.sup.14 C]-N-trifluoroacetyl daunorubicin from which the protecting group is removed by mild alkaline hydrolysis to afford [14-.sup.14 C]-daunorubicin which is then, in the form of the hydrochloride, reacted with bromine to form the corresponding labelled 14-bromo derivative, which, upon treatment with sodium formate leads to [14-.sup.14 C]-doxorubicin.
摘要:
The known antibiotic daunomycin, and the novel compounds daunomycin-.beta.-anomer and 4'-epidaunomycin (both .alpha.- and .beta.-anomers) are prepared by condensing daunomycinone with reactive novel intermediates which are 1-chloro-2,3,6-trideoxy-3-trifluoroacetamido-4-trifluoroacetoxy-.alpha.-L-lyxo (or arabino) hexopyranoses.
摘要:
The invention relates to distamycin A analogs of the following formula ##STR1## wherein n is 2, 3 or 4; A is an optionally substituted divalent radical chosen from ##STR2## and --Het-- wherein Het is a pentatomic or hexatomic heteromonocyclic ring, except pyrrole; and wherein either one of R.sub.1 and R.sub.2 is hydrogen and the other is an acylating moiety or R.sub.1 and R.sub.2 are both hydrogen or both alkyl groups optionally substituted, including the pharmaceutically acceptable salts of the said compounds.The compounds of the invention can be useful antitumor and antiviral agents.
摘要:
The invention relates to distamycin A analogs of the following formula ##STR1## wherein n is 2, 3 or 4; A is an optionally substituted divalent radical chosen from ##STR2## and -Het- wherein Het is a pentatomic or hexatomic heteromonocyclic ring, except pyrrole; and wherein either one of R.sub.1 and R.sub.2 is hydrogen and the other is an acylating moiety or R.sub.1 and R.sub.2 are both hydrogen or both alkyl groups optionally substituted, including the pharmaceutically acceptable salts of the said compounds.The compounds of the invention can be useful antitumor and antiviral agents.
摘要:
Disclosed is a process for preparing the new antitumor glycosides: 4'-deoxy-3'-epi-daunorubicin and 4'-deoxy-3'-epi-doxorubicin starting from the known 3'-epi-4'-keto-N-trifluoroacetyl-daunorubicin.Reduction of the 4'-keto group with sodium borohydride to the corresponding 4'-hydroxy group, reacting the so obtained intermediate with trifluoromethanesulphonic anhydride followed by treatment with n-tetrabutylammonium iodide, dehalogenated reductively, by treatment with tributyl tin hydride to 4'-deoxy-3'-epi-N-trifluoroacetyl-daunorubicin.A mild alkaline hydrolysis removes the N-protecting group to give 4'-deoxy-3'-epi-daunorubicin which is successively transformed, via its 14-bromo derivative, in its doxorubicin analogue.