SI9011409A - O-methyl azitromycin derivates, methods and intermediates for their preparation and methods for preparation of pharmaceuticals products which comprise them - Google Patents
O-methyl azitromycin derivates, methods and intermediates for their preparation and methods for preparation of pharmaceuticals products which comprise them Download PDFInfo
- Publication number
- SI9011409A SI9011409A SI9011409A SI9011409A SI9011409A SI 9011409 A SI9011409 A SI 9011409A SI 9011409 A SI9011409 A SI 9011409A SI 9011409 A SI9011409 A SI 9011409A SI 9011409 A SI9011409 A SI 9011409A
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- SI
- Slovenia
- Prior art keywords
- group
- methyl
- represent
- hydrogen
- azithromycin
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000543 intermediate Substances 0.000 title description 4
- 239000003814 drug Substances 0.000 title 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 18
- 229960004099 azithromycin Drugs 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 10
- 150000007524 organic acids Chemical class 0.000 claims abstract description 10
- 235000005985 organic acids Nutrition 0.000 claims abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 6
- 125000001584 benzyloxycarbonyl group Chemical group C(=O)(OCC1=CC=CC=C1)* 0.000 claims description 33
- 229910052739 hydrogen Inorganic materials 0.000 claims description 33
- 239000001257 hydrogen Substances 0.000 claims description 33
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 30
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 23
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 19
- 238000007069 methylation reaction Methods 0.000 claims description 19
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- UYWQUFXKFGHYNT-UHFFFAOYSA-N phenylmethyl ester of formic acid Natural products O=COCC1=CC=CC=C1 UYWQUFXKFGHYNT-UHFFFAOYSA-N 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 17
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- 150000002431 hydrogen Chemical class 0.000 claims description 15
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 13
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 10
- 239000011541 reaction mixture Substances 0.000 claims description 10
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 9
- MQTOSJVFKKJCRP-BICOPXKESA-N azithromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)N(C)C[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 MQTOSJVFKKJCRP-BICOPXKESA-N 0.000 claims description 9
- 235000019253 formic acid Nutrition 0.000 claims description 9
- 238000007327 hydrogenolysis reaction Methods 0.000 claims description 9
- ORVGLRAXIUNDTG-SBXXAWCKSA-N (2r,3s,4r,5r,8r,10r,11r,12s,13s,14r)-11-[(2s,3r,4s,6r)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-2-ethyl-3,4-dihydroxy-13-[(2r,4r,5s,6s)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-10-methoxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadec Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)N(C)C[C@H](C)C[C@](C)([C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)OC)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 ORVGLRAXIUNDTG-SBXXAWCKSA-N 0.000 claims description 8
- 239000012442 inert solvent Substances 0.000 claims description 8
- 230000002829 reductive effect Effects 0.000 claims description 8
- HSDAJNMJOMSNEV-UHFFFAOYSA-N benzyl chloroformate Chemical compound ClC(=O)OCC1=CC=CC=C1 HSDAJNMJOMSNEV-UHFFFAOYSA-N 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 150000002576 ketones Chemical class 0.000 claims description 5
- 230000011987 methylation Effects 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 claims description 4
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000004683 dihydrates Chemical class 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 229910000104 sodium hydride Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000008282 halocarbons Chemical class 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- VUQUOGPMUUJORT-UHFFFAOYSA-N methyl 4-methylbenzenesulfonate Chemical compound COS(=O)(=O)C1=CC=C(C)C=C1 VUQUOGPMUUJORT-UHFFFAOYSA-N 0.000 claims description 2
- MBABOKRGFJTBAE-UHFFFAOYSA-N methyl methanesulfonate Chemical compound COS(C)(=O)=O MBABOKRGFJTBAE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 239000002798 polar solvent Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 239000012312 sodium hydride Substances 0.000 claims description 2
- 239000003937 drug carrier Substances 0.000 claims 1
- 239000008194 pharmaceutical composition Substances 0.000 claims 1
- 239000000825 pharmaceutical preparation Substances 0.000 abstract description 4
- ULGZDMOVFRHVEP-RWJQBGPGSA-N Erythromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=O)[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 ULGZDMOVFRHVEP-RWJQBGPGSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 229960003276 erythromycin Drugs 0.000 description 10
- 229930006677 Erythromycin A Natural products 0.000 description 9
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000338 in vitro Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- TWCMVXMQHSVIOJ-UHFFFAOYSA-N Aglycone of yadanzioside D Natural products COC(=O)C12OCC34C(CC5C(=CC(O)C(O)C5(C)C3C(O)C1O)C)OC(=O)C(OC(=O)C)C24 TWCMVXMQHSVIOJ-UHFFFAOYSA-N 0.000 description 4
- PLMKQQMDOMTZGG-UHFFFAOYSA-N Astrantiagenin E-methylester Natural products CC12CCC(O)C(C)(CO)C1CCC1(C)C2CC=C2C3CC(C)(C)CCC3(C(=O)OC)CCC21C PLMKQQMDOMTZGG-UHFFFAOYSA-N 0.000 description 4
- PFOARMALXZGCHY-UHFFFAOYSA-N homoegonol Natural products C1=C(OC)C(OC)=CC=C1C1=CC2=CC(CCCO)=CC(OC)=C2O1 PFOARMALXZGCHY-UHFFFAOYSA-N 0.000 description 4
- 239000003120 macrolide antibiotic agent Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000003242 anti bacterial agent Substances 0.000 description 3
- 230000000845 anti-microbial effect Effects 0.000 description 3
- 229940088710 antibiotic agent Drugs 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- FZYUKBLYECHAGN-HOQMJRDDSA-N (2r,3s,4r,5r,8r,10r,11r,12s,13s,14r)-2-ethyl-3,4,10-trihydroxy-13-[(2r,4r,5s,6s)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-11-[(2s,3r,4s,6r)-3-hydroxy-6-methyl-4-(methylamino)oxan-2-yl]oxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)N(C)C[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@@H](NC)C[C@@H](C)O2)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 FZYUKBLYECHAGN-HOQMJRDDSA-N 0.000 description 2
- MWBJRTBANFUBOX-SQYJNGITSA-N (3r,4s,5s,6r,7r,9r,10e,11s,12r,13s,14r)-6-[(2s,3r,4s,6r)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-14-ethyl-12,13-dihydroxy-10-hydroxyimino-4-[(2r,4r,5s,6s)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-7-methoxy-3,5,7,9,11,13-hexamethyl-oxacyclot Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=N/O)/[C@H](C)C[C@](C)([C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)OC)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 MWBJRTBANFUBOX-SQYJNGITSA-N 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 150000001204 N-oxides Chemical class 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- -1 benzyloximino Chemical class 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- AGOYDEPGAOXOCK-KCBOHYOISA-N clarithromycin Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=O)[C@H](C)C[C@](C)([C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)OC)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 AGOYDEPGAOXOCK-KCBOHYOISA-N 0.000 description 2
- 229960002626 clarithromycin Drugs 0.000 description 2
- 238000002451 electron ionisation mass spectrometry Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000010898 silica gel chromatography Methods 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- BHZOKUMUHVTPBX-UHFFFAOYSA-M sodium acetic acid acetate Chemical compound [Na+].CC(O)=O.CC([O-])=O BHZOKUMUHVTPBX-UHFFFAOYSA-M 0.000 description 2
- 238000006265 spirocyclization reaction Methods 0.000 description 2
- KYTWXIARANQMCA-PGYIPVOXSA-N (3r,4s,5s,6r,7r,9r,10z,11s,12r,13s,14r)-6-[(2s,3r,4s,6r)-4-(dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-14-ethyl-7,12,13-trihydroxy-10-hydroxyimino-4-[(2r,4r,5s,6s)-5-hydroxy-4-methoxy-4,6-dimethyloxan-2-yl]oxy-3,5,7,9,11,13-hexamethyl-oxacyclotetradec Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=N\O)/[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 KYTWXIARANQMCA-PGYIPVOXSA-N 0.000 description 1
- YKAVHPRGGAUFDN-JTQLBUQXSA-N 24464-30-0 Chemical compound O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]2(C)O[C@]3([C@@H]([C@H]2O)C)[C@H](C)C[C@](O3)(C)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 YKAVHPRGGAUFDN-JTQLBUQXSA-N 0.000 description 1
- VQEMDSRIOVZAOM-UHFFFAOYSA-N 4-(4-methylsulfonylphenyl)-1,3-thiazol-2-amine Chemical compound C1=CC(S(=O)(=O)C)=CC=C1C1=CSC(N)=N1 VQEMDSRIOVZAOM-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- COVZYZSDYWQREU-UHFFFAOYSA-N Busulfan Chemical compound CS(=O)(=O)OCCCCOS(C)(=O)=O COVZYZSDYWQREU-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241000194033 Enterococcus Species 0.000 description 1
- 241000194032 Enterococcus faecalis Species 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000588748 Klebsiella Species 0.000 description 1
- 241000191938 Micrococcus luteus Species 0.000 description 1
- 241000589517 Pseudomonas aeruginosa Species 0.000 description 1
- 241000191940 Staphylococcus Species 0.000 description 1
- 241001147691 Staphylococcus saprophyticus Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002152 alkylating effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- CELPHAGZKFMOMR-UHFFFAOYSA-N azanium;dichloromethane;methanol;hydroxide Chemical compound [NH4+].[OH-].OC.ClCCl CELPHAGZKFMOMR-UHFFFAOYSA-N 0.000 description 1
- 229960004924 azithromycin dihydrate Drugs 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002026 chloroform extract Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 125000000468 ketone group Chemical group 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- QZIQJVCYUQZDIR-UHFFFAOYSA-N mechlorethamine hydrochloride Chemical compound Cl.ClCCN(C)CCCl QZIQJVCYUQZDIR-UHFFFAOYSA-N 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N nitroxyl Chemical compound O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H17/00—Compounds containing heterocyclic radicals directly attached to hetero atoms of saccharide radicals
- C07H17/04—Heterocyclic radicals containing only oxygen as ring hetero atoms
- C07H17/08—Hetero rings containing eight or more ring members, e.g. erythromycins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/04—Antibacterial agents
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Genetics & Genomics (AREA)
- Molecular Biology (AREA)
- Communicable Diseases (AREA)
- Oncology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Saccharide Compounds (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Description
PLIVA farmaceutska, kemijska, prehrambena i kozmetička industrija, d.d.
Ο-Metil derivati azitromicina, postopki in intermediati za njihovo pripravo ter postopki za pripravo farmacevtskih preparatov, kijih vsebujejo
Izum se nanaša na O-metil derivate azitromicina, nove polsintetične makrolidne antibiotike iz skupine azalidov z antimikrobnim delovanjem, njihove farmacevtsko sprejemljive adicijske soli, metode in intermediate za njihovo pridobivanje ter metode priprave in uporabe kot farmacevtskih preparatov, kijih vsebujejo.
Izum se nanaša na O-metil derivate azitromicina s splošno formulo (I)
kjer je
Rl = R2 = CO2CH2C6H5, R3 - -CH3, R4 = H (la) Rl = R2 = CO2CH2C6H5, R3 = R4 = -CH3 (Ib)
Rl = R2 = CO2CH2C6H5, R3 = H, R4 = -CH3 (Ic) Rl = r2 =r4 = h, R3 = -CH3 (Id)
Rl = r2 =h, R3 = R4 = -ch3 (ie)
Rl = r2 =r3 = R r4 = -CH3 (If)
Rl = R4 =H, R2 = R3 = ‘CH3 (Ig)
Rl = H, R2 = R3 = R4 = -CH3 (Ih)
Rl = r3 =h, R2 = R4 = -CH3 (Ii) in na njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami.
Eritromicin A je makrolidni antibiotik, katerega zgradbo karakterizira 14-členski aglikonski obroč s keto skupino v C-9 položaju (Bunch R. L. in sod.. US patent 2,653,899; 9/1953). Med makrolidnimi antibiotiki je na vodilnem mestu pri humani terapiji infekcijskih obolenj. V kislem okolju lahko preide v anhidroeritromicin, neaktiven C-6/C-12 metabolit spiroketalne zgradbe (Kurath P. in sod., Experientia 1971, 27, 362). Znano je, da se spirociklizacija eritromicina A uspešno inhibira s kemijsko transformacijo C-9 ketona ob pripravi C-9 oksima (Bokič S. in sod., Tetrahedron Lett., 1967, 1945) ali C-9(S), oz. C-9(R) amina (Egan R. S. in sod., J. Org. Chem., 1974, 39, 2492) ali z eliminacijo C-9 ketona in razširitvijo aglikonskega prstana (Kobrehel G. in sod., US patent 4,328,334 5/1982). Z Beckmannovim pregrajevanjem eritromicin A oksima in nato z redukcijo dobljenega iminoetra (Bokič S. in sod., J. Chem. Soc. Perkin Trans. 1, 1986, 1881) je sintetiziran prvi 15-členski makrolidni antibiotik iz skupine azalidov, 11-aza-lO-deokso-lO-dihidroeritromicin A. Z Nmetiliranjem na novo uvedene sekundarne amino skupine v aglikonskem obroču po modificiranem Eschvveiler-Clarkovem postopku s formaldehidom ob prisotnosti mravljinčne kisline (Kobrehel G. in S. Bokič, BE Pat. 892,357 7/1982) ali preliminarno zaščito amino skupin s prevajanjem v ustrezne N-okside in nato z alkiliranjem in redukcijo dobljenih N-oksidov (Bright G., US patent 4,474,768 10/1984) je pripravljen N-metil-1 l-aza-10-deokso-10-dihidroeritromicin A (9-deokso-9a-aza-9a-metil-9a-homoeritromicin A, IUPAC Nomenklatura organske kemije, 1979, 68 - 70, 459, 500 - 503), kateri se klinično obravnava? pod generičnim imenom AZITHROMYCIN. Razen večje stabilnosti v kisli sredini, z ozirom na izhoden antibiotik, kaže azitromicin povečano in vitro aktivnost z ozirom na gram-negativne mikroorganizme, izrazito višjo koncentracijo v tkivu in prav tako se preučuje možnost enodnevnega doziranja (ratshema J. in sod., Antimikrob. Agents Chemother., 1987, 31 1939).
Nadalje je znano, da se C-67C-12 spirociklizacija eritromicina A uspešno inhibira z Ometiliranjem hidroksilne skupine v C-6 položaju aglikonskega prstana (VVatanabe Y. in sod., US patent 4,331,803 5/1982). Z reakcijo eritromicina z benzilkloroformatom in nato z metiliranjem dobljenega 2’-O,3’-N-bis(benziloksikarbonil)-derivatom ob eliminaciji zaščitnih skupin v 2’- in 3’- položaju in N-metiliranjem 3'-metilamino skupine pod reduktivnimi pogoji ob 6-O-metileritromicinu nastanejo značilne količine ll-Ometil- in 6,11-di-O-metileritromicina (Morimo S. in sod., J. Antibiotics 1984, 37, 187). večja selektivnost se doseže s preliminarnim oksimiranjem C-9 ketona ter O-metiliranjem ustreznih benziloksimino derivatov (Morimoto S. in sod., US patent 4,680,368 7/1987). 6-O-Metileritromicin klinično obravnavamo pod generičnim imenom CLARITHROMYCIN. Z ozirom na eritromicin A, klaritromicin pokaže povečano in vitro aktivnost z ozirom na gram-pozitivne mikroorganizme (Kirist H. A. in sod., Antimicrobial Agents and Chemother., 1989, 1419).
Po znanem in utrjenem stanju tehnike O-metil derivati azitromicina in njihove farmacevtsko sprejemljive adicijske soli s kislinami, postopki in intermediati za njihovo pridobivanje ter postopki priprave farmacevtskih preparatov, ki jih vsebujejo, do danes niso bili znani.
Ugotovili smo, kar predstavlja predmet tega izuma, da O-metil derivate azitromicina, nove polsintetične antibiotike iz skupine azalidov z antimikrobnim delovanjem in njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami lahko pripravimo z reakcijo azitromicina ali njegovega dihidrata (Dokič S. in sod., J. Chem. Research (S), 1988, 152 - 153; (M) 1988, 1239 - 1261) z benzilklorformatom in nato z O-metiliranjem hidroksilnih skupin v C-6 in C-ll položaju dobljenega 2’-O,3’-Nbis(benziloksikarbonil)-N-demetilazitromicina z metiljodidom ob prisotnosti ustreznih baz in nato z eliminacijo zaščitnih benziloksikarbonilnih skupin v 2’- in 3’- položaju s postopkom hidrogenolize ter z reduktivnim N-metiliranjem 3’-metilamino skupine s formaldehidom ob prisotnosti mravljinčne kisline ali drugega redukcijskega sredstva in nato po potrebi z reakcijo z anorganskimi ali organskimi kislinami.
Ugotovili smo, da se dajo pripraviti O-metil derivati azitromicina s splošno formulo (I) ch3
kjer je
Rl = R2 = CO2CH2C6H5, R3 = -CH3, R4 = H (la) Rl = r2 = CO2CH2C6H5, R3 = R4 = -CH3 (Ib)
Rl = R2 = CO2CH2C6H5, R3 = H, R4 = -CH3 (Ic) Rl = r2 =r4 = h, R3 = -CH3 (Id)
Rl = r2 =h, r3 = r4 = -CH3 (le)
Rl = r2 =r3 = H, R4 = -ch3 (If)
Rl = R4 =H, R2 = R3 = 'CH3 (lg)
Rl = H, R2 = R3 = R4 = -CH3 (Ih)
Rl = R3 =h, R2 = R4 = -CH3 (Ii) in njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami, z reakcijo azitromicina ali njegovega dihidrata s formulo (Ila)
Ila R1 = H, R2 = -CH3
Ilb Rl = R2 = CO2CH2C6H5 kjer Rl predstavlja vodik, R2 je -CH3 skupina, z benzilkloroformatom z viškom ustrezne baze, kot je natrijev hidrogen karbonat, v reakcijskem inertnem topilu, kot je benzen, pri temperaturi od 25 °C do 60 °C, v času od 3 do 24 ur, odvisno od temperature reakcije in nato z = O-metiliranjem hidroksilnih skupin v C-6 in C-ll položaju dobljenega 2’-O,3’-N-bis(benziloksikarbonil)-N-demetilazitromicina s formulo (Ilb), kjer sta Rl in R2 medsebojno enaka in pomenita benziloksikarbonilno skupino z 1 - 18 molskim prebitkom ustreznega sredstva za metiliranje, kot je metil jodid, dimetilsulfat, metilmetan sulfonat ali metil p-toluensulfonat, ob prisotnosti ustrezne baze kot je npr. natrijev hidrid, kalijev ali natrijev lug v polarnem topilu kot npr. dimetilsulfoksid ali Ν,Ν-dimetilformamid ali zmes z inertnim topilom, kot so npr. tetrahidrofuran, acetonitril, etilacetat, 1,2-demetoksietan pri temperaturi od 0 °C d osobne temperature, v času od 4 do 30 ur, da dobimo zmes 2’-O,3-Nbis(benziloksikarbonil)-N-demetil-6-O-metil-azitromicina (la), kjer sta Rl in R2 medsebojno enaka in predstavljata benzioksikarbonilno skupino. R3 predstavlja -CH3 skupino, R4 predstavlja vodik, 2’-O,3’-N-bis(benziloksikarbonil)-N-demetil-6,ll-di-Ometilazitromicin (Ib), kjer sta Rl in R2 enaka in predstavljata benziloksikarbonilni skupini in R3 in R4 predstavljata -CH3 skupino in 2’-0,3’-N-bis(benziloksikarbonil)-Ndemetil-ll-O-metilazitromicin (lc), kjer sta Rl in R2 medsebojno enaka in predstavljata benziloksikarbonilni skupini, R3 predstavlja vodik in R4 predstavlja -CH3 skupino, ki jo po potrebi podvržemo
A) separaciji na stolpcu silikagela (Siliča gel 60, Merck Co., 70 -230 mesh) ob uporabi sistema topil CH2C12:CH3OH:NH4OH (90:9:1.5) da dobimo kromatografsko homogeno spojino (la) z Rf 0.794, (Ib) z Rf 0.816 in (lc) z Rf 0.943, ki jih nato podvržemo eliminaciji zaščitnih benziloksikarbonilnih skupin v 2’- in 3’- položaju s postopkom hidrogenolize v raztopini nižjih alkoholov kot npr. metanola ali etanola, ob prisotnosti katalizatorja kot npr. paladijskega črnila ali paladija na oglju v atmosferi vodika pod tlakom od 1 - 20 bar, ob mešanju reakcijske zmesi v teku 4 do 14 ur pri sobni temperaturi, da dobimo po filtraciji katalizatorja in izolaciji produkta z običajnimi postopki pH gradient ekstrakcije (pH 5.0 in pH 9.0) iz vode z ustreznim hidrofobnim topilom kot so kloroform, diklormetan, etilacetat in podobno, 6-O-metil-Ndemetilazitromicin (Id), kjer Rl , R2 in R4 predstavljajo vodik in R2 predstavlja -CH3 skupino ali 6,11-di-O-metil-N-demetilazitromicin (le), kjer Rl in R2 predstavljata vodik, R2 in R^ predstavljata-CH3 skupino ali 11-O-metil-N-demetilazitromicin (If), kjer Rl, R2 in R2 predstavljajo vodik, predstavlja -CH3 skupino, ki jih nato podvržemo redukcijskem N-metiliranju 3’-metilamino skupine z 1- 3 ekvivalenti formaldehida (37%) ob prisotnosti enake količine mravljinčne kisline (98 - 100 %) ali nekega drugega vira vodika, v reakcijsko inertnem topilu kot so npr. halogenirani ogljikovodiki, kot. npr. kloroform ali nižji alkoholi, kot npr. metanol ali etanol, nižji ketoni kot npr. aceton pri temperaturi refluksiranja reakcijske zmesi v teku 2 do 8 ur, da dobimo po izolaciji produkta z običajnimi metodami pH gradient ekstrakcije (pH 5.0 in pH 9.0) 6-O-metilazitromicin (Ig), kjer sta Rl in R^ medsebojno enaka in predstavljata vodik in R2 in R2 predstavljata -CH3 skupino ali 6,11-di-O-metilazitromicin (Ih), kjer Rl predstavlja vodik in so R2, R-1 in R^ medsebojno enaki in skupaj predstavljajo -CH3 skupino ali ll-O-metilazitromicin (Ii), kjer sta Rl in R2 medsebojno enaka in predstavljata vodik in R2 in R^ predstavljata -CH3 skupino, ali alternativno
B) eliminaciji zaščitnih benziloksikarbonilnih skupin v 2’- in 3’- položajih s postopkom hidrogenolize kot smo navedli v točki A), da dobimo zmes 6-O-metil- (Id), 6,11-di-Ometil- (le) in 11-O-metil-N-demetilazitromicina (If),katero podvržemo reduktivnemu N-metiliranju s formaldehidom (37%) ob prisotnosti mravljinčne kisline (98 - 100%) ali nekega drugega vira vodika, kot smo navedli v A), da dobimo zmes 6-O-metil- (Ig), 6,11-di-O-metil- (Ih) in ll-O-metilazitromicina (Ii), kjer imajo Rl. R2, R2 in R^ zgoraj navedeni pomen, katero nato podvržemo separaciji na stolpcu silikagela ob uporabi sistema topila ChbCbUH^-Ol-hNl^OH (90:9:1.5). da dobimo kromatografsko homogen (TLC. isti sistem topila), (lg) z Rf 0.494, ( Ih) z Rf 0.575 ii; f Ii) z Rf 0.536.
Farmacevtsko sprejemljive adicijske soli, ki so prav tako predmet tega izuma, pridobimo z reakcijo O-metil derivatov azitromicina s formulo (I) z najmanj ekvimolsko količino ustrezne anorganske ali organske kisline, kot so klorovodikova, jodovodikova, žveplova, fosforna, ocetna, propionska, trifluorocetna, maleinska, citronska, stearinska, jantarna, etiljantarna, metansulfonska, benzensulfonska, p-toluensulfonska, laurilsulfonska in podobne v reakcijskem inertnem topilu. Adicijske soli izoliramo s filtracijo - v kolikor so netopne v reakcijskem inertnem topilu - z obarjanjem s pomočjo netopila ali odparevanjem topila, najpogosteje z liofilizacijo.
Ο-Metil derivati azitromicina (Ig), (Ih) in (Ii) in njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami imajo močno antimikrobno delovanje. Antibakterijska in vitro aktivnost je določena s skupino gram-pozitivnih in gram-negativnih test-bakterij in kliničnih izolatov.
Rezultati izraženi kot minimalne inhibicijske koncentracije (MIC, ^g/ml) kažejo, da se z 6-O-metiliranjem azitromicina poveča antibakterijska aktivnost v odnosu na eritromicin A (Tabela 1 in Tabela 2). Glede na dobljene rezultate pripravljene spojine lahko uporabimo kot antibiotike za zdravljenje raznih infekcijskih bolezni v običajnih farmacevtskih oblikah.
Tabela 1. Antibakterijska in vitro aktivnost 6-O-metilazitromicina (Ig) v primerjavi z eritromicinom A
Posk. organizem | Minimalne inhibitorne koncentracije (MlCvjug/ml) | |
Eritromicin A | (Ig) | |
Staphylococcus ciureus ATCC 6538 P | < 0.4 | < 0.4 |
Streptococcus faecalis ATCC 8043 | < 0.4 | < 0.4 |
Sarcina lutea ATCC 9341 | < 0.4 | < 0.4 |
Escherichia coli ATCC 10536 | 50.0 | 1.6 |
Klebsiella pueuniouiae ATCC 10031 | > 50.0 | 12.5 |
Pseudomonas aeruginosa NETC 10490 | > 50.0 | > 50.0 |
Tabela 2. Antibakterijska in vitro aktivnost 6-O-metilazitromicina (Ig) v primerjavi z eritromicinom A v seriji sveže izoliranih kliničnih izolatov
Posk. organizem Minimalne inhibitorne koncentracije (MICvgg/ml)
Eritromicin A (Ig)
Staphylococcus | ||
aureus 10099 | 0.1 | 0.05 |
Staphylococcus saprophyticus 3947 | 0.4 | 0.4 |
Enterococcus 10390 | 0.8 | 0.8 |
Staphylococcus aureus 10097 | 0.1 | 0.05 |
Sireptococcus pneuinoniae 4050 | 0.1 | 0.025 |
Haemophylus influenzae 4028 | 0.05 | 0.05 |
Postopek priprave O-metil derivatov azitromicina prikazujejo naslednji primeri, ki v ničemer ne omejujejo obseg izuma.
Primer 1
Z^-OD^N-Bisfbenziloksikarbonil j-N-demetilazitromicin (Ilb);
Metoda A - Raztopini azitromicin dihidrata (30 g, 0.038 molov) v 140 ml suhega benzena smo dodali ΝηΗΟΟβ (48 g), reakcijsko zmes smo segrevali in mešali pri 55 do
60 °C in nato postopoma 1 uro dokapavali 75 ml (89.63 g. 0.53 molov) benzilkloroformata. Reakcijsko suspenzijo smo mešali pri isti temperaturi 3 ure in jo pustili stati čez noč pri sobni temperaturi. Benzensko suspenzijo smo trikrat ekstrahirali s 150 ml 0.25N HCl, benzensko raztopino sušili nad CaCl2, filtrirali in uparili pod zmanjšanim tlakom do gostega olja. Dobljeni ostanek smo dokapavali ob intenzivnem mešanju v 500 ml ohlajenega petroletra, reakcijsko suspenzijo mešali ob hlajenju nadaljnje 4 ure, usedlino filtrirali, izprali s petroletrom ter sušili, da smo dobili 27.5 g (71.6%) naslovnega produkta, tal. 95 - 102 °C.
TLC, CH2CI2-CH3OH-NH4OH (90:9:1.5) Rf 0.925
IR(CHC13): 3510, 3350, 2960,1740, 1690, 1605, 1450, 1380, 1330, 1290, 1255,1160, 1115,1050, 995 cm’1.
IH NMR (CDCI3): 2.301 (3H, 9a-NCH3), 2.844, 2.802 (3H, 3’-NCH3), 3.397 ppm (3H, 3”-OCH3).
2’-Q,3,-N-Bis(benziloksikarbonil)-N-demetilazitromicin (Ilb):
Metoda B - Raztopini benzilkloroformata (30 ml, 0.21 molov) v 50 ml suhega benzena smo dodali ob mešanju NaHCO3 (22 g) in nato postopoma 3 ure po 15 g (0.019 molov) azitromicina. V trenutku koje dodano 3/4 od skupne količine azitromicina, smo dodali še nadaljnjih 15 ml (0.106 molov) benzilkloroformata. Reakcijsko zmes smo mešali 24 ur pri sobni temperaturi, filtrirali in filtrat trikrat ekstrahirali s 150 ml 0.25N HCl, sušili nad MgSO4 ter uparili pod zmanjšanim tlakom. Z dodatkom petroletra nastane usedlina surovega 2’-0,3’-N-bis(benziloksikarbonil)-N-demetilazitromicin, dobljeno usedlino smo filtrirali in takoj nato suspendirali ob mešanju v 50 ml hladnega etra. reakcijsko suspenzijo smo mešali 1 uro pri sobni temperaturi, usedlino filtrirali in sušili, da smo dobili 8.67 g (43.09 %) TLC homogenega produkta z enakimi fizikalnokemijskimi konstantami, kot smo navedli v Metodi A.
Primer 2
O-Metiliranje 2’-O.3’-N-Bis(benziloksikarbonil)-N-demetilazitromicin a (la), (Ib) in (lej
Raztopini 6 g (0.006 molov) produkta iz Primera 1 v 64 ml dimetilsulfoksida in tetrahidrofurana (1:1) smo dodali 6.6 ml (0.106 molov) metiljodida in nato postopoma 4 ure pri sobni temperaturi 1.2 g (cca. 0.03 mole) 55 - 60 % NaH v olju. Reakcijsko suspenzijo smo mešali nadaljnjih 5 ur, pustili stati čez noč in nato izlili k nasičeni raztopini NaCl (100 ml) ter dvakrat ekstrahirali s 100 ml etilacetata. Združene organske ekstrakte smo trikrat oprali s 100 ml nasičene raztopine NaCl, sušili nad K2CO3 ter uparili, da smo dobili 6.35 g surovega produkta, ki smo ga podvrgli hidrogenolizi po postopku opisanem v Primeru 9, ali pa po potrebi očistili s kromatografijo na stolpcu silikagela (Siliča gel 60, Merck Co., 70 - 230 mesh) s pomočjo sistema topil CH2Cl2:CH3OH:NH4OH (90:9:1.5).
Iz 1.5 g surovega prodkta smo s koncentriranjem in uparjenjem frakcij z Rf 0.943 (TLC.
isti sistem topil) dobili 0.38 g kromatografsko čistega 2’-0,3’-N-bis(benziloksikarbonil)N-demetil-ll-O-metil azitromicin (Ic);
iH NMR (CDCI3): 2.239 (3H, 9a-NCH3), 2.805, 2.847 (3H, 3’-NCH3), 3.374 (3H, 3”-OCH3) in 3.573 ppm (3H, II-OCH3).
Z uparjejem frakcij z Rf 0.816 smo dobili 0.316 g 2’-0,3’-N-bis(benziloksikarbonil)-Ndemetil-6,ll-di-0-metilazitromicina (Ib);
IR(CHC13): 3570, 3490,1740,1690,1455,1380,1330,1295,1260, 1200,
1160,1120,1095,1055,1005, 990, 980 cm’1.
IH NMR (CDC13): 2.292 (3H, 9a-NCH3), 2.838, 2.795 (3H, 3’-NCH3), 3.380 (6H, 6-OCH3 in 3”-OCH3), 3.488 ppm (3H, 11-OCH3).
13C NMR (CDC13): 177.939 (C-l), 69.471 (C-9), 35.271 (9a-NCH3), 88.994 (C-ll), 52.892 (6-OCH3), 61.09 (11-OCH3), 36.851 (3’-NCH3) in 49.549, 49.154 ppm (3”-OCH3).
S koncentriranjem in uparjenjem frakcije Rf 0.794 do suhega smo dobili 0.646 g 2’-O,3’N-bis(benziloksikarbonil)-N-demetil-6-0-metil-azitromicina (la);
EI-MS m/z 1016 (M+)
IR(CHC13): 3670, 3500, 2960, 2920, 1740, 1690, 1450, 1380, 1325,
1290, 1255, 1200, 1160, 3120, 1050, 995 cm'1.
iH NMR (CDC13): 2.288 (3H, 9a-NCH3), 2.805, 2.847 (3H, 3’-NCH3) in 3.380 ppm (6H, 6-OCH3 in 3”-OCH3).
13C NMR (CDC13): 177.764 (C-l), 68.850 (C-9), 34.851 (9a-NCH3), 74.661 (C-ll), in 52.822 ppm (6-OCH3).
Primer 3
6-O-metil-N-demetilazitromicin (Id) - 2.0 g (0.002 mola) 2’-O,3’-N-bis(benziloksikarbonil)-N-demetil-6-O-metil-azitromicina (la) smo raztopili v 30 ml etanola. Raztopini smo dodali 10 ml vode, ki je vsebovala 0.185 ml ocetne kisline in 0.3 g natrijevega acetata in 0.7 g Pd/C 10 %. Reakcijsko zmes smo mešali pod pritiskom vodika 10 bar, 10 ur, katalizator filtrirali in uparili do suhega. Ostanek smo raztopili v CHC13 (30 ml), dodali vodo (30 ml), pH reakcijske zmesi naravnali z IN HCl na 5.0, sloje oddvojili in vodni sloj še dvakrat ekstrahirali s 15 ml CHC13. Vodni raztopini smo dodali CHC13 (30 ml), pH naravnali z mešanjem na 9.0 (2N NaOH), sloje oddvojili in vodni sloj še dvakrat ekstrahirali s 15 ml CHC13. Združene organske ekstrakte s pH 9.0 smo sušili nad K2CO3, filtrirali ter uparili, da smo dobili 1.03 g (70%) naslovnega produkta.
TLC, Rf 0.282
IR(CHC13): 3670, 3500, 2960, 2920, 1725, 1460, 1375, 1345, 1320, 1280, 1260, 1165, 1120,1085, 1045, 1010, 995, 900 cm’1.
IH NMR (CDCI3): 2.278 (3H, 9a-NCH3), 2.406 (3H, 3’-NCH3), 3.312 (3H, 3”-OCH3), 3.384 ppm (3H, 6-OCH3).
Primer 4
6.11-Di-O-metil-N-demetilazitromicin (Ie) - Po postopku opisanem v Primeru 3, smo iz 0.165 g (0.16 mmolov) 2’-0,3’-N-bis(benziloksikarbonil)-N-demetil-6,ll-di-0-metil azitromicina (Ib) s hidrogenolizo s Pd/C 10 % v etanolu v prisotnosti pufra natrijev acetat-ocetna kslina (pH 5.0) dobili 0.093 g (76.2 %) kromatografsko homogenega naslovnega produkta, tal. 95 - 98 °C.
M+ 762
TLC, Rf 0.331
Ih NMR(CDC13): 2.252 (3H, 9a-CH3), 2.393 (3H, 3’-NCH3), 3.308 (3H, 3”-OCH3), 3.374 (3H, 6-OCH3) in 3.518 ppm (3H, 11-OCH3).
Primer 5
11-O-metil-N-demetilazitromicin (If) - Po postopku opisanem v Primeru 3 smo iz 0.250 g (0.246 mmolov) 2’-O,3’-N-bis(benziloksikarbonil)-N-demetil-ll-O-metilazitromicina (Ic) s hidrogenolizo v metanolu ob prisotnosti pufra natrijev acetat-ocetna kislina (pH 5.0) in Pd/C 10 %, dobili 0.168 g (89,5 %) 11-O-metil-Ndemetilazitromicina;
TLC, Rf 0.367
IR(CDC13): 3500, 2970, 2940, 1736, 1460, 1380, 1165cnr]
Primer 6
6-O-Metilazitromicin fig) - Raztopini 0.78 g (0.00104 molov) 6-O-metil-Ndemetilazitromicina (Id) v CHC13 (50 ml) smo dodali 0.085 ml (0.00113 molov) formaldehida (37 %) in 0.078 ml (0.00203 molov) mravljinčne kisline (98 - 100 %). Reakcijsko zmes smo mešali ob refluksu 8 ur, ohladili do sobne temperature in izlili v ml vode. pH Reakcijske zmesi smo naravnali z IN HC1 na 5.0, sloje oddvojili in vodni sloj ekstrahirali še dvakrat z 20 ml CHCI3. Vodnemu delu smo dodali 20 ml CHCI3, pH naravnali z 2N NaOH na 9.0, sloje oddvojili in vodni sloj še dvakrat ekstrahirali z 20 ml CHCI3. Združene CHCI3 ekstrakte pri pH 9.0 smo sušili nad K2CO3 ter uparili, da smo dobili 0.495 g (62,74 %) produkta iz naslova, ki smo ga po potrebi očistili s kromatografijo na stolpcu silikagela s pomočjo sistema topil CH2Cl2:CH3OH:NH4OH (90:9:1.5);
TLC, Rf 0.494
IR (KBr): 3500, 2980, 2940,1740, 1462, 1385, 1330, 1280, 1260, 1170,1112,1059,1018 in 1055 cm'l lH NMR(CDC13): 2.292 (9H, 3’-N(CH3)2 in 9a-N-CH3), 3.335 (3H, 3”-OCH3) in 3.384 ppm (3H, 6-OCH3).
13C NMR(CDC13): 177.540 (C-l), 68.850 (C-9), 36.851 (9a-NCH3), 78.106 (C-6), 52.822 (6-OCH3), 61.627 (C-10), 40.350 (3’-N(CH3)2) in 49.457 ppm (3”-OCH3). Biološka aktivnost: 1 mg vsebuje 754 /zg azitromicina.
Primer 7
6.11-Di-O-metilazitromicin (Ih) - Po postopku opisanem v Primeru 6, smo iz 0.181 g (0.237 mmolov) 6,11-di-O-metil-N-demetilazitromicina (le) z redukcijskim Nmetiliranjem s formaldehidom (37 %) ob prisotnosti mravljinčne kisline (98 - 100 %) dobili 0.12 g (65.6 %) naslovnega produkta; EI-MS m/z 776 (M + )
TLC, Rf 0.575 lH NMR(CDC13); 2.292 (3H, 9a-N-CH3), 2.318 (6H. 3’-N(CH3)2), 3.321 (3H, 3OCH3), 3.38 (3H, 6-OCH3) in 3.524 ppm (3H. II-OCH3).
]3C NMR(CDC13): 177.540 (C-l), 68.237 (C-9), 36.739 (9a-NCH3), 88.112 (C-ll), 52.653 (6-OCH3) in 61.852 ppm (II-OCH3).
Primer 8
11-O-Metilazitromicin (Ii) - Po postopku opisanem v Primeru 6, smo iz 0.32 g (0.43 mmolov) 11-O-metil-N-demetikizitromicina (If) z redukcijskim N-metiliranjem s formaldehidom (37 %) ob prisotnosti mravljinčne kisline (98 - 100 %) dobili 0.238 g (72.44 %) ll-O-metil-derivata (Ii) iz naslova;
TLC, Rf 0.536
IR (KBr); 3510, 2975, 2940, 1738, 1460, 1350, 1165, 1054 cm’1 lH NMR (CDCI3): 2.246 (3H, 9a-CH3), 2.301 (6H, 2’-N(CH3)2),
3.348 (3H, 3”-OCH3) in 3.590 ppm (3H, 11-OCH3).
Primer 9
6-0-Metilazitromicin (Ig), 6,11-di-O-metilazitromicin (Ih) in 11-0-metilazitromicin (Ii) (Metoda B) - (1). Raztopini 2.16 g surovega produkta iz Primera 2 v etanolu (30 ml) smo dodali 10 ml vode, ki vsebuje 0.185 ml ocetne kisline in 0.3 g natrijevega acetata in 0.7 g Pd/C 10 % in nato reakcijsko zmes podvrgli (izpostavili?) hidrogenolizi kot smo opisali v Primeru 3. Pri pH 9.0 smo dobili 0.98 g zmesi 6-O-metil- (Id), 6,11-di-O-metil(Ie) in ll-o-metil-N-demetilazitromicina (If). (2) 0.98 g zmesi dobljene pod (19 smo raztopili v CHC13 (50 ml), dodali 0.106 ml formaldehida (37 %) in 0.096 ml mravljinčne kisline (98 -100 %) in podvrgli (izpostavili?) N-metiliranju kot smo opisali v Primeru 6. Pri pH 9.0 smo izolirali 0.537 g zmesi , ki smo jo izpostavili kromatografiji na stolpcu silikagela (Siliča gel 60, Merck Co., 70 - 230 mesh) s pomočjo sistema topil CH2Cl2:CH3OH:NH4OH (90:9:1.5), da smo dobili 0.238 g kromatografsko homogenega (Ig) z Rf 0.494, 0.145 g (Ih) z Rf 0.575 in 0.105 g (Ii) z Rf 0.536.
Claims (13)
- PATENTNI ZAHTEVKI1. Ο-Metil derivati azitromicina s splošno formulo (I), ch3 kjer je r1 = r2 — CO2CH2C6H5, R3 = -CH3, R4 = H (Ia)Rl = R2 = CO2CH2C6H5, R3 = r4 = _ch3 (Ib)Rl = R2 = CO2CH2C6H5, R3 = H, R4 = -CH3 (lc)Rl = r2 =r4 = h, R3 = -CH3 (Id)Rl = r2 =H, R3 = R4 = -CH3 (le)Rl = r2 =r3 = H) r4 = -CH3 (If)Rl = R4 =H, R2 = r3 = -CH3 (Ig)Rl = H, = R3 = r4 = -CH3 (Ih)Rl = r3 =h, R2 = R4 = -CH3 (Ii) in njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami.
- 2. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da sta Rl in R2 medsebojno enaka in predstavljata benziloksikarbonilno skupino, R3 predstavlja -CH3 skupino in R^ je vodik.
- 3. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da sta Rl in R2 medsebojno enaka in predstavljata benziloksikarbonilno skupino, R3 in R^ predstavljata -CH3 skupino.
- 4. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da sta R4 in R2 medsebojno enaka in predstavljata benziloksikarbonilno skupino, R2 je vodik in R4 predstavlja -CH3 skupino.
- 5. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da so R4 in R2 in R4 medsebojno enaki in predstavljajo vodik, in R3 predstavlja -CH3 skupino.
- 6. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da sta R4 in R2 medsebojno enaka in predstavljata vodik in R2 in R4 predstavljata -CH3 skupino.
- 7. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da so R4, R2 in R·3 medsebojno enaki in predstavljajo vodik, R4 pa predstavlja -CH3 skupino.
- 8. Ο-Metil derivat azitromicina po zahtevku 1, označen s tem, da sta R4 in R4 medsebojno enaka in predstavljata vodik in R2 in R2 predstavljata -CH3 skupino.
- 9. Ο-Metil derivat azitromicina po zahtevku 1, označena s tem, da R4 predstavlja vodik, R2, R2 in R4 so medsebojno enaka in predstavljajo -CH3 skupino.
- 10. Ο-Metil derivat azitromicina po zahtevku 1, označena s tem, da sta R4 in R-3 medsebojno enaka in predstavljata vodik ter R2 in R4 predstavljata -CH3 skupino.
- 11. Snov s formulo (Ilb) kjer sta Rl in R2 medsebojno enaka in predstavljata benziloksikarbonilno skupino.
- 12. Postopek za pripravo O-metil derivatov azitromicina s splošno formulo I ch3 kjer je r1 = r2 = CO2CH2C6H5, R3 = -CH3, R4 = H (Ia)Rl = R2 = CO2CH2C6H5, R3 = R4 = -CH3 (Ib) r1 = r2 — CO2CH2C6H5, R3 = H, R4 = -CH3 (Ic)R1 = R2 =R4 = H, R3 = 'CH3 (Id)R1 = R2 =H, R3 = R4 = 'CH3 (Ie)Rl = r2 =r3 = h, R4 = -CH3 (If) r1 = R4=h,R2 = R3 = -CH3 (Ig)R1 = H, R2 = R3 = R4 = -CH3 (Ih)R1 = R3 =H, R2 = R4 = -CH3 (Ii) in njihove farmacevtsko sprejemljive adicijske soli z anorganskimi ali organskimi kislinami, z reakcijo azitromicina ali njegovega dihidrata s formulo (Ila)Ila Rl = H, R2 = -CH3Ilb Rl = R2 = CO2CH2C6H5 kjer Rl predstavlja vodik, R2 je -CH3 skupina, z benzilkloroformatom z viškom ustrezne baze, kot je natrijev hidrogen karbonat, v reakcijskem inertnem topilu, kot je benzen, pri temperaturi od 25 °C do 60 °C, v času od 3 do 24 ur, odvisno od temperature reakcije in nato z = O-metiliranjem hidroksilnih skupin v C-6 in C-ll položaju dobljenega 2’-O,3’-N-bis(benziloksikarbonil)-N-demetilazitromicina s formulo (Ilb), kjer sta Rl in R2 medsebojno enaka in pomenita benziloksikarbonilno skupino z 1 - 18 molskim prebitkom ustreznega sredstva za metiliranje, kot je metil jodid, dimetilsulfat, metilmetan sulfonat ali metil p-toluensulfonat, ob prisotnosti ustrezne baze kot je npr. natrijev hidrid, kalijev ali natrijev lug v polarnem topilu kot npr. dimetilsulfoksid ali N,N-dimetilformamid ali zmes z inertnim topilom, kot so npr. tetrahidrofuran, acetonitril, etilacetat, 1,2-demetoksietan pri temperaturi od 0 °C d osobne temperature, v času od 4 do 30 ur, da dobimo zmes 2’-O,3-Nbis(benziloksikarbonil)-N-demetil-6-0-metil-azitromicina (la), kjer sta RA in R2 medsebojno enaka in predstavljata benzioksikarbonilno skupino. R2 predstavlja -CH3 skupino, R^ predstavlja vodik, 2’-0,3’-N-bis(benziloksikarbonil)-N-demetil-6,ll-di-0metilazitromicin (Ib), kjer sta Rl in R2 enaka in predstavljata benziloksikarbonilni skupini in R2 in R^ predstavljata -CH3 skupino in 2’-O,3’-IN-biS(benziloksikarbonil)-Ndemetil-ll-O-metilazitromicin (Ic), kjer sta Rl in R2 medsebojno enaka in predstavljata benziloksikarbonilni skupini, R2 predstavlja vodik in R^ predstavlja -CH3 skupino, ki jo po potrebi podvržemoA) separaciji na stolpcu silikagela (Siliča gel 60, Merck Co., 70 -230 mesh) ob uporabi sistema topil CH2Cl2:CH3OH:NH4OH (90:9:1.5) da dobimo kromatografsko homogeno spojino (la) z Rf 0.794, (Ib) z Rf 0.816 in (Ic) z Rf 0.943, ki jih nato podvržemo eliminaciji zaščitnih benziloksikarbonilnih skupin v 2’- in 3’- položaju s postopkom hidrogenolize v raztopini nižjih alkoholov kot npr. metanola ali etanola, ob prisotnosti katalizatorja kot npr. paladijskega črnila ali paladija na oglju v atmosferi vodika pod tlakom od 1 - 20 bar, ob mešanju reakcijske zmesi v teku 4 do 14 ur pri sobni temperaturi, da dobimo po filtraciji katalizatorja in izolaciji produkta z običajnimi postopki pH gradient ekstrakcije (pH 5.0 in pH 9.0) iz vode z ustreznim hidrofobnim topilom kot so kloroform, diklormetan, etilacetat in podobno, 6-O-metil-Ndemetilazitromicin (Id), kjer Rl , R2 in R^ predstavljajo vodik in R2 predstavlja -CH3 skupino ali 6,11-di-O-metil-N-demetilazitromicin (le), kjer Rl in R2 predstavljata vodik, RJ in R^ predstavljata-CH3 skupino ali ll-O-metil-N-demetilazitromicin (If), kjer Rl, R2 in R2 predstavljajo vodik, R^ predstavlja -CH3 skupino, ki jih nato podvržemo redukcijskem N-metiliranju 3’-metilamino skupine z 1- 3 ekvivalenti formaldehida (37%) ob prisotnosti enake količine mravljinčne kisline (98 - 100 %) ali nekega drugega vira vodika, v reakcijsko inertnem topilu ko; >0 npr. halogenirani ogljikovodiki, kot. npr. kloroform ali nižji alkoholi, kot npr. metanol ali etanol, nižji ketoni kot npr. aceton pri temperaturi refluksiranja reakcijske zmesi v teku 2 do 8 ur, da dobimo po izolaciji produkta z običajnimi metodami pH gradient ekstrakcije (pH 5.0 in pH 9.0) 6-O-metilazitromicin (Ig), kjer sta Rl in R^ medsebojno enaka in predstavljata vodik in R2 in R2 predstavljata -CH3 skupino ali 6,1 l-di-O-metilazitromicin (Ih), kjer Rl predstavlja vodik in so R2, R2 in R^ medsebojno enaki in skupaj predstavljajo -CH3 skupino ali 11-O-metilazitromicin (Ii), kjer sta Rl in R^ medsebojno enaka in predstavljata vodik in R^ in R4 predstavljata -CH3 skupino, ali alternativnoB) eliminaciji zaščitnih benziloksikarbonilnih skupin v 2’- in 3’- položajih s postopkom hidrogenolize kot smo navedli v točki A), da dobimo zmes 6-O-metil- (Id), 6,11-di-Ometil- (Ie) in 11-O-metil-N-demetilazitromicina (If),katero podvržemo reduktivnemu N-metiliranju s formaldehidom (37%) ob prisotnosti mravljinčne kisline (98 - 100%) ali nekega drugega vira vodika, kot smo navedli v A), da dobimo zmes 6-O-metil- (Ig), 6,11-di-O-metil- (Ih) in 11-O-metilazitromicina (Ii), kjer imajo Rl, R^ r3 in R4 zgoraj navedeni pomen, katero nato podvržemo separaciji na stolpcu silikagela ob uporabi sistema topila ΟΗ^Ο^ΟΗβ-ΟΗιΝΗζίΟΗ (90:9:1.5), da dobimo kromatografsko homogen (TLC, isti sistem topila), (Ig) z Rf 0.494, (Ih) z Rf 0.575 in (Ii) z Rf 0.536, katere po potrebi podvržemo reakciji z najmanj enim ekvivalentom anorganskih ali organskih kislin, da dobimo ustrezne farmacevtsko sprejemljive adicijske soli.
- 13. Postopek za pripravo farmacevtskega preparata z antibakterijsko aktivnostjo, označen s tem, da obsega antibakterijsko učinkovito količino snovi iz zahtevka 1 in farmacevtsko sprejemljiv nosilec.
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CR20190524A (es) | 2017-05-19 | 2020-01-10 | Lunella Biotech Inc | Antimitoscinas: inhibidores específicos de la biogénesis mitocondrial para erradicar células madre cancerosas |
US12006553B2 (en) | 2017-05-19 | 2024-06-11 | Lunella Biotech, Inc. | Companion diagnostics for mitochondrial inhibitors |
CR20200033A (es) | 2017-06-26 | 2020-03-05 | Lunella Biotech Inc | Mitocetoscinas: agentes terapéuticos basados en mitocondrias que fijan como objetivo el metabolismo de cetonas en células cancerosas |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4474768A (en) * | 1982-07-19 | 1984-10-02 | Pfizer Inc. | N-Methyl 11-aza-10-deoxo-10-dihydro-erytromycin A, intermediates therefor |
JPS61103890A (ja) * | 1984-10-26 | 1986-05-22 | Taisho Pharmaceut Co Ltd | 6−0−メチルエリスロマイシンa誘導体 |
EP0184921A3 (en) * | 1984-12-08 | 1986-10-29 | Beecham Group Plc | Erythromycin derivatives |
US4833236A (en) * | 1986-05-02 | 1989-05-23 | Taisho Pharmaceutical Co., Ltd. | Erythromycin derivatives |
WO1989002271A1 (en) * | 1987-09-10 | 1989-03-23 | Pfizer | Azithromycin and derivatives as antiprotozoal agents |
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1990
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1991
- 1991-07-06 SK SK2195-91A patent/SK279075B6/sk unknown
- 1991-07-12 CA CA002046956A patent/CA2046956C/en not_active Expired - Fee Related
- 1991-07-16 CZ CS912195A patent/CZ280640B6/cs not_active IP Right Cessation
- 1991-07-16 RO RO148016A patent/RO109338B1/ro unknown
- 1991-07-17 DK DK91111948.5T patent/DK0467331T3/da active
- 1991-07-17 AT AT91111948T patent/ATE129715T1/de not_active IP Right Cessation
- 1991-07-17 EP EP91111948A patent/EP0467331B1/en not_active Expired - Lifetime
- 1991-07-17 UA UA5001127A patent/UA27105A1/uk unknown
- 1991-07-17 DE DE69114198T patent/DE69114198T2/de not_active Expired - Fee Related
- 1991-07-17 RU SU915001127A patent/RU2045533C1/ru not_active IP Right Cessation
- 1991-07-17 BG BG94837A patent/BG60593B1/bg unknown
- 1991-07-17 ES ES91111948T patent/ES2081397T3/es not_active Expired - Lifetime
- 1991-07-18 HU HU912408A patent/HUT59935A/hu unknown
- 1991-07-18 US US07/731,781 patent/US5250518A/en not_active Expired - Lifetime
- 1991-07-18 JP JP3178514A patent/JP2657132B2/ja not_active Expired - Fee Related
- 1991-07-18 HU HU9802439A patent/HU221803B1/hu not_active IP Right Cessation
- 1991-07-18 HU HU9202619A patent/HU215158B/hu unknown
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- 1991-07-18 CN CN91104907A patent/CN1029738C/zh not_active Expired - Fee Related
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1992
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1995
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Also Published As
Publication number | Publication date |
---|---|
HU215158B (hu) | 1998-12-28 |
GR3018330T3 (en) | 1996-03-31 |
HUT62307A (en) | 1993-04-28 |
CN1029738C (zh) | 1995-09-13 |
HUT59935A (en) | 1992-07-28 |
PL166379B1 (en) | 1995-05-31 |
JP2657132B2 (ja) | 1997-09-24 |
DE69114198D1 (de) | 1995-12-07 |
CZ280640B6 (cs) | 1996-03-13 |
BG60593B1 (bg) | 1995-09-29 |
HU9802439D0 (en) | 1998-12-28 |
CA2046956A1 (en) | 1992-01-19 |
UA27105A1 (uk) | 2000-02-28 |
EP0467331B1 (en) | 1995-11-02 |
BG94837A (bg) | 1993-12-24 |
RU2045533C1 (ru) | 1995-10-10 |
CS219591A3 (en) | 1992-03-18 |
RO109338B1 (ro) | 1995-01-30 |
DE69114198T2 (de) | 1996-06-27 |
HU211659A9 (en) | 1995-12-28 |
EP0467331A1 (en) | 1992-01-22 |
ES2081397T3 (es) | 1996-03-01 |
HU221803B1 (hu) | 2003-01-28 |
PL291130A1 (en) | 1992-11-16 |
HRP920491A2 (en) | 1994-08-31 |
HU912408D0 (en) | 1991-12-30 |
CA2046956C (en) | 1999-01-05 |
HU9202619D0 (en) | 1992-12-28 |
US5250518A (en) | 1993-10-05 |
ATE129715T1 (de) | 1995-11-15 |
CN1059728A (zh) | 1992-03-25 |
DK0467331T3 (da) | 1996-02-05 |
JPH05132497A (ja) | 1993-05-28 |
HRP920491B1 (en) | 1998-10-31 |
SK279075B6 (sk) | 1998-06-03 |
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