摘要:
The present invention relates to derivatives of 3-deoxy desmycosin of the formula I, wherein, starting from triply protected desmycosin, there are performed an oxidation at C-3 in the first step and then, optionally, a hydrogenation of double bonds and an epoxidation followed by a reductive opening of the oxirane ring. The present invention also relates to derivatives of 3-deoxy-desmycosin of the formula II, wherein in the first step triacetyl desmycosin is hydrogenated and then, via an intermediate mesylate, it is converted to a 2,3-didehydro derivative; or 2,3-didehydro-desmycosin is subjected to epoxidation reactions followed by a reductive opening of the oxirane ring.
摘要:
The invention relates to derivatives of 12,13-epoxy-tylosin, the novel seynthetic antibiotics from tylosin group and the methods of their preparation. According to this invention hydrogenation followed by oximation of 12,13-epoxy-tylosin derivatives yields the following tylosin derivatives: 10,11-dihydro-12,13-epoxy, respectively 10,11-dihydro-12,13-epoxy oxime. Direct oximation of 12,13-epoxy tylosin derivative gives 12,13-epoxy oxime derivatives of tylosin.
摘要:
The present invention relates to 12,13-dihydroxy derivatives of tylosin, new semisynthetic compounds of the macrolide class, and to a process for their preparation. According to the present invention by the oxidation of 13-hydroxy derivative a 12,13-dihydroxy compound is obtained, which can be subsequently subjected to a series of reactions such as oximation, reduction (catalytic, electrochemical) or hydrolysis yielding corresponding dihydro or tetrahydro 12,13-dihydroxy derivatives.
摘要:
Seco compounds from a class of tylosins represented by the formula I whereinR stands for H or CH.sub.3,R.sup.1 stands for H, CH.sub.3, C.sub.1 -C.sub.3 acyl or aryl sulfonyl,R.sup.2 stands for H and R.sup.3 stands for NH.sub.2 or OH, or R.sup.2 and R.sup.3 together stand for .dbd.O or .dbd.NOH,R.sup.4 stands for H or C.sub.1 -C.sub.3 acyl,and the line - - - stands for a double or a single bond,and to a process for their preparation are provided.Oximation of 4'-demicarosyl-8a-aza-8a-homorelymycin causes breaking of the lactam to obtain a seco compound. The seco compound can be subjected to reductive N-alkylation or to conversion of the hydroxyimino group into a keto group and then optionally to N- or N,O-acylation, a catalytical hydrogenation of the double bond or a reduction of the ketone or a reduction of the hydroxyimino group into an amino group.
摘要:
The invention relates to 13-hydroxy-tylosine derivatives, novel semisynthetic antibiotics from the class of macrolides, and to a process for the preparation thereof. According to the present invention by a reductive opening of the oxirane ring of tylosine 13-hydroxy compounds are obtained, which are then subjected to a hydrogenation of the double bond and then 13-hydroxy dihydro or tetrahydro compounds are subjected to an oximation reaction or 13-hydroxy oximes are subjected to the hydrogenation of the double bond.
摘要:
Derivatives of tylosin and 10,11,12,13-tetrahydro tylosin of the general formula ##STR1## wherein R stands for CHO, CH.sub.2 OH, CH.dbd.NOH or CH(OCH.sub.3).sub.2,R.sup.1 stands for H,R.sup.2 stands for OH orR.sup.1 +R.sup.2 stand for .dbd.O or .dbd.NOH,R.sup.3 stands for a mycarosyl group or a hydrogen atom, and stands for a single or a double bond;methods for the manufacture thereof; their use as antimicrobial agents and processes for the preparation of the latter.
摘要:
The invention relates to the use of complexes and chelates resp., of antitics with bivalent and/or trivalent metals in antiulcer drugs, to new complexes and chelates resp., of antibiotics with bivalent and/or trivalent metals and to processes for the obtaining thereof.
摘要:
New 2:1 complexes of N-methyl-11-aza-10-deoxo-10-dihydroerythromycin A or 11-aza-10-deoxo-10-dihydroerythromycin A with bivalent metals chosen form the group comprising Cu.sup.+2, Zn.sup.+2, Co.sup.+2, Ni.sup.+2 and Ca.sup.+2, a process for their manufacture and their use in the manufacture of antibiotically active pharmaceuticals.New 2:1 complexes of N-methyl-11-aza-10-deoxo-10-dihydroerythromycin A or 11-aza-10-deoxo-10-dihydroerythromycin A with bivalent metals chosen from the group comprising Cu.sup.+2, Zn.sup.+2, Co.sup.+2, Ni.sup.+2 and Ca.sup.+2 are made by reacting N-methyl-11-aza-10-deoxo-10-dihydroerythromycin A or 11-aza-10-deoxo-10-dihydroerythromycin A in its free base form or in its water-soluble salt form with salts of said bivalent metals. The compounds possess antibiotic activity.
摘要:
10-dihydro-10-deoxo-11-azaerythronolide A compounds and pharmaceutically acceptable acid addition salts of said compounds; methods and intermediates for the manufacture thereof; their use as antiinflammatory agents and processes for their preparation.