摘要:
The known antitumor antibiotic adriamycin and its .beta.-anomer, and the novel compounds, 4'-epiadriamycin (both .alpha.- and .beta.-anomers) are prepared by condensing a novel, reactive protected derivative of adriamycinone with reactive intermediates which are 1-halo-2,3,6-trideoxy-3-trifluoroacetamido-4-trifluoroacetoxy-.alpha.-L-lyxo (or arabino) hexopyranoses.
摘要:
Compounds are disclosed with the general formula in which the groups are as defined in the description here below and characterized by the presence of polyamine substituents on the imine/oxime residue, such amine groups being in turn protected by suitable protective groups. Said compounds are endowed with potent topoisomerase I inhibiting activity and therefore are useful as medicaments for the treatment of tumors and viral and parasite infections.
摘要:
Camptothecin derivatives of camptothecin of formula (I) wherein the groups R1, R2 and R3 are as defined in the description are disclosed. The compounds of formula (I) are endowed with antitumor activity and show a good therapeutic index.Processes for the preparation of the compounds of formula (I) and their use in the preparation of medicaments useful in the treatment of tumors, viral infections and antiplasmodium falciparum are also disclosed.
摘要:
Compounds are disclosed with the general formula in which the groups are as defined in the description here below and characterized by the presence of polyamine substituents on the imine/oxime residue, such amine groups being in turn protected by suitable protective groups. Said compounds are endowed with potent topoisomerase I inhibiting activity and therefore are useful as medicaments for the treatment of tumours and viral and parasite infections.
摘要:
Partially desulphated glycosaminoglycan derivatives are described, particularly heparin, and more particularly a compound of formula (I) where the U, R and R1 groups have the meanings indicated in the description. These glycosaminoglycan derivatives have antiangiogenic and heparanase-inhibiting activity and are devoid of anticoagulant activity.
摘要:
Camptothecin derivatives of camptothecin of formula (I) wherein the groups R1, R2 and R3 are as defined in the description are disclosed. The compounds of formula (I) are endowed with antitumor activity and show a good therapeutic index. Processes for the preparation of the compounds of formula (I) and their use in the preparation of medicaments useful in the treatment of tumors, viral infections and antiplasmodium falciparum are also disclosed.
摘要:
The present invention describes a process for the industrial production of L-carnitine, comprising the enantioselective reduction of an alkyl 4-chloro-3-oxobutyrate or 4-chloro-3-oxobutyramide. The optically active 3-hydroxy derivative thus obtained is reacted with trimethylamine, obtaining crude L-carnitine, which is then finally purified. The catalyst used for the reduction is a complex of ruthenium bound to a penta-atomic bis-heteroaromatic system. The reduction reaction, performed in controlled conditions of hydrogen pressure, substrate concentration, temperature, and substrate: catalyst molar ratio, enables 4-chloro-3-hydoxybutyrate or 4-chloro-hydroxybutyamide to be obtained in a high yield. The process described, which leads to L-carnitine being obtained, is easily applicable on an industrial scale.
摘要:
Camptothecin derivatives of camptothecin of formula (I) wherein the groups R1, R2 and R3 are as defined in the description are disclosed. The compounds of formula (I) are endowed with antitumor activity and show a good therapeutic index. Processes for the preparation of the compounds of formula (I) and their use in the preparation of medicaments useful in the treatment of tumors, viral infections and antiplasmodium falciparum are also disclosed.
摘要:
20S-Camptothecin derivatives in which the 7-position bears as a substituent --CN, --CH(CN)R.sub.4, --CH.dbd.C(CN)R.sub.4, --C(.dbd.NOH)NH.sub.2, --C(.dbd.NH)NH.sub.2, --CH.dbd.C(NO.sub.2)R.sub.4, --CH(CN)R.sub.5, --CH(CH.sub.2 NO.sub.2)R.sub.5, tetrazol-5-yl, 4,5-dihydrooxazol-2-yl, or 1,2,4-oxadiazolin-3-yl-5-one. These compounds are active as topoisomerase I inhibitors, and can be used as antitumor drugs.
摘要:
The invention relates to compounds of formula ##STR1## wherein Ar is mono- or bicyclic ring system chosen from benzene, naphthalene, tetrahydronaphthalene, quinoline and indole;Het is ##STR2## R is hydrogen, halogen, hydroxy, C.sub.1 -C.sub.6 alkoxy, C.sub.2 -C.sub.6 acyloxy, cyano, nitro, amino or --COOR.sub.3 in which R.sub.3 is hydrogen or C.sub.1 -C.sub.6 alkyl;R.sub.1 is hydrogen, hydroxy, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.2 -C.sub.6 acyloxy, cyano, nitro, amino or --COOR.sub.3 in which R.sub.3 is as defined above;R.sub.2 is hydrogen, halogen, hydroxy or C.sub.1 -C.sub.6 alkyl; and the pharmaceutically acceptable salts thereof, and wherein when at the same time the (Ar)R.sub.1 R.sub.2 group represents unsubstituted phenyl or 4-chloro-, 4-cyano-, 4-amino- or 3,4-dimethoxy-phenyl and Het is a 4-homophthalimide group, then R is other than hydrogen, which are useful as anti-proliferative agents.