摘要:
Conjugates of general formula 1:[A--O--W--Z].sub.a --T 1wherein the moiety A--O-- is the residue of drug of formula A--O--H in which --O--H is a primary or secondary hydroxyl group; a is an integer of from 1 to 30; W is a group of general formula 2: ##STR1## wherein b is an integer of from 1 to 4, B represents a C.sub.1 -C.sub.3 alkylene group and R.sub.1 and R.sub.2 each independently represent hydrogen, halogen, alkyl, phenyl or substituted phenyl; Z is a spacer group and T is a carrier moiety.
摘要:
Anthracycline glycosides of general formula 1 and 2: ##STR1## wherein R.sub.1 is hydrogen or a methoxy group; R.sub.2 is hydrogen, a hydroxy group or represents an acyloxy residue of formula 3 --O--COR.sub.5 wherein R.sub.5 is a linear or branched C.sub.1 -C.sub.8 alkyl, an aryl group or a heterocyclic mono or bicyclic ring, each of which may be unsubstituted or substituted with (a) an amino group NR.sub.6 R.sub.7 in which R.sub.6 and R.sub.7 are independently hydrogen or C.sub.1 -C.sub.4 alkyl or (b) a carboxy group; R.sub.3 and R.sub.4 both represent hydrogen or one of R.sub.3 and R.sub.4 is hydrogen and the other is hydroxy group or a group of formula --OSO.sub.2 R.sub.8 in which R.sub.8 may be a linear or branched alkyl group containing from 1 to 6 carbon atoms or an aryl group unsubstituted or substituted by 1 to 3 substituents each of which may independently be a linear or branched alkyl or alkoxy group of from 1 to 6 carbon atoms, a halogen atom or a nitro group; and pharmaceutically acceptable salts thereof; are active as antitumor agents.
摘要翻译:通式1和2的蒽环酸苷:其中R 1是氢或甲氧基; R2是氢,羟基或代表式3-COR5的酰氧基残基,其中R5是直链或支链C1-C8烷基,芳基或杂环单环或双环,其各自可以是未取代或取代的 与(a)氨基NR 6 R 7,其中R 6和R 7独立地是氢或C 1 -C 4烷基或(b)羧基; R 3和R 4均代表氢或R 3和R 4之一是氢,另一个是羟基或式-OSO 2 R 8基团,其中R 8可以是含有1至6个碳原子的直链或支链烷基或未取代的芳基 或被1〜3个取代基取代,各自可以独立地为具有1-6个碳原子的直链或支链烷基或烷氧基,卤素原子或硝基; 及其药学上可接受的盐; 作为抗肿瘤剂有活性。
摘要:
An anthracycline glycoside of general formula 1: ##STR1## wherein R.sub.1 is hydrogen or methoxy group; R.sub.2 is hydrogen or hydroxy group, A and B both represent hydrogen or one of A and B is hydrogen and the other is hydroxy or a group of formula --OSO.sub.2 R.sub.5 in which R.sub.5 is C1-C4 alkyl or aryl optionally substituted by C1-C4 alkyl, nitro, amino, methoxy or halogen; R.sub.3 is a hydrogen atom or a group of formula 2 and R.sub.4 is a group of formula 2--(CH.sub.2).sub.n --X 2in which n is 2 or 3 and X is hydroxy group, a halogen or a group of formula --OSO.sub.2 R.sub.5 in which R.sub.5 is as defined above and with the proviso that if R.sub.2, X and A are an hydroxy group and R.sub.3 .dbd.H, n must be 3; or a pharmaceutically acceptable salt thereof.Compounds of the invention have activity as antitumor agents. Processes for their preparation and pharmaceutical composition containing them are also disclosed.
摘要:
Anthracycline glycosides having the general formula 1 and 2: ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, fluorine, hydroxy or amino; R.sub.2 and R.sub.3 represent hydroxy or one of R.sub.2 and R.sub.3 is a hydrogen atom, a nitro or an amino group and the other of R.sub.2 and R.sub.3 is a HYDROXY group, exhibit activity against LoVo and LoVo/Dx in vitro.
摘要:
Anthracycline glycosides of the general formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or a hydroxyl group, one of R.sub.2 and R.sub.3 represents a hydrogen atom and the other of R.sub.2 and R.sub.3 represents a hydrogen atom or a hydroxyl group; and pharmaceutically acceptable acid addition salts thereof are antitumor agents. These glycosides may be prepared from a daunomycinone derivative of formula (II): ##STR2## in which the 4-amino group is protected. 4-Demethoxy-4-amino-daunomycinone (II) and an earlier intermediate in its preparation, 4-demethoxy-4-amino-7-deoxy-daunomycinone (IX), can be diazotized followed by mild reduction to form 4-demethoxy-daunomycinone or 4-demethoxy-7-deoxy-daunomycinone respectively. 4-Demethoxy-daunomycinone can be converted into another antitumor anthracycline glycoside, 4-demethoxy-daunorubicin.
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.
摘要:
Daunomycin derivatives of the formula: ##STR1## wherein R.sub.1 is a lower alkyl having from 1 to 4 carbon atoms and R is hydrogen or a trifluoroacetyl group are useful in treating certain mammalian tumors.
摘要:
Daunomycin derivatives of the formula: ##STR1## wherein R.sub.1 is a lower alkyl having from 1 to 4 carbon atoms and R is a hydrogen atom or a trifluoroacetyl group are useful in treating certain mammalian tumors.
摘要:
A process is disclosed for the preparation of a compound of the formula ##STR1## where R and R.sup.1 are defined herein below, wherein a compound of the structure; ##STR2## is reacted in a suitable solvent with a haloamide in the presence of a metal oxide or a haloamide in the presence of a free radical initiator under the influence of light or heat or alternatively with a halogen in the presence of a metal oxide, to give a compound of the structure; ##STR3## which compound, in a suitable solvent is reacted with a suitable nucleophilic reagent to obtain the compound; ##STR4## which compound is then subjected to allylic halogenation to give a compound of the structure; ##STR5## which is then reacted with a reducing agent to yield I.
摘要:
A process is disclosed for preparing cephalosporins of structure: ##STR1##where R is selected from the class consisting of hydrogen, alkyl having from 1 to 4 carbon atoms, cyano-methyl-, thienyl-methyl, furyl-methyl-, naphthyl-methyl-, phenyl-methyl-, phenoxy-methyl-, phenyl-isopropyl-, phenoxy-isopropyl-, pyridyl-4-thiomethyl-, and tetrazolyl-1-methyl;R.sup.1 is selected from the class consisting of hydroxyl, alkoxy with 1 to 4 carbon atoms, trichloroethoxy-, benzyloxy-, p-methoxy-benzyloxy-, p-nitrobenzyloxy-, benzhydryloxy-, triphenylmethoxy-, phenacyloxy-, and p-halophenacyloxy;Z is selected from the class consisting of hydrogen, hydroxyl, --O--alkyl, --O--CO--alkyl, --Br, --I, --N.sub.3, --NH.sub.2, --O--CO--CH.sub.3, --O--CO--NH.sub.2 and an --S--mononuclear nitrogen heterocyclic ring;Wherein a compound of structure: ##STR2## is reacted in a suitable solvent at a temperature between -20.degree. C and +80.degree. C, in the presence of an aqueous organic or inorganic acid with an azoderivative of the formula: ##STR3## where R.sup.2 and R.sup.3 are equal or different and represent lower alkyl, a mononuclear aryl ring, CN--, a mononuclear heterocyclic ring, or the radicals --COR.sup.4, --COOR.sup.4, ##STR4## --CONHR.sup.4, or R.sub.2 and R.sub.3 together may represent the residues; ##STR5## where T represents >CH.sub.2, >N -- R.sup.4, and R.sup.4 is lower alkyl, a mononuclear aryl ring or a mononuclear heterocyclic, ring to give a compound of structure: ##STR6## in which R, R.sup.1, R.sup.2, R.sup.3, and Z have the meanings given above, and said intermediate (II') is reacted in a suitable solvent at a temperature between -100.degree. C and +120.degree. C with a compound selected from the class consisting of inorganic basic or weakly acid oxides, and inorganic and organic bases, to finally give the desired compound (III) which is isolated and purified in known manner.