DE2057541A1 - Verfahren zur Enolisierung von Steroiden - Google Patents
Verfahren zur Enolisierung von SteroidenInfo
- Publication number
- DE2057541A1 DE2057541A1 DE19702057541 DE2057541A DE2057541A1 DE 2057541 A1 DE2057541 A1 DE 2057541A1 DE 19702057541 DE19702057541 DE 19702057541 DE 2057541 A DE2057541 A DE 2057541A DE 2057541 A1 DE2057541 A1 DE 2057541A1
- Authority
- DE
- Germany
- Prior art keywords
- dione
- enolate
- diene
- base
- steroid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 34
- 150000003431 steroids Chemical class 0.000 title claims description 19
- 238000005837 enolization reaction Methods 0.000 title claims description 10
- 239000002585 base Substances 0.000 claims description 27
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 22
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 11
- -1 triarylmethyl compound Chemical class 0.000 claims description 11
- 230000008707 rearrangement Effects 0.000 claims description 10
- 229910052783 alkali metal Inorganic materials 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- 150000001340 alkali metals Chemical class 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000011541 reaction mixture Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 125000001424 substituent group Chemical group 0.000 claims description 7
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 125000005843 halogen group Chemical group 0.000 claims description 5
- 239000007858 starting material Substances 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- VMUWIFNDNXXSQA-UHFFFAOYSA-N hypofluorite Chemical compound F[O-] VMUWIFNDNXXSQA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 125000004423 acyloxy group Chemical group 0.000 claims description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- 229910052792 caesium Inorganic materials 0.000 claims description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 150000002905 orthoesters Chemical class 0.000 claims description 2
- XHFXMNZYIKFCPN-UHFFFAOYSA-N perchloryl fluoride Chemical compound FCl(=O)(=O)=O XHFXMNZYIKFCPN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052701 rubidium Inorganic materials 0.000 claims description 2
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims description 2
- SMBZJSVIKJMSFP-UHFFFAOYSA-N trifluoromethyl hypofluorite Chemical group FOC(F)(F)F SMBZJSVIKJMSFP-UHFFFAOYSA-N 0.000 claims description 2
- 230000002140 halogenating effect Effects 0.000 claims 2
- 125000000468 ketone group Chemical group 0.000 claims 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims 1
- 239000005711 Benzoic acid Substances 0.000 claims 1
- 150000001408 amides Chemical class 0.000 claims 1
- 235000010233 benzoic acid Nutrition 0.000 claims 1
- VWWMOACCGFHMEV-UHFFFAOYSA-N dicarbide(2-) Chemical compound [C-]#[C-] VWWMOACCGFHMEV-UHFFFAOYSA-N 0.000 claims 1
- 238000003683 electrophilic halogenation reaction Methods 0.000 claims 1
- 125000001033 ether group Chemical group 0.000 claims 1
- 125000001475 halogen functional group Chemical group 0.000 claims 1
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical group C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims 1
- 150000004678 hydrides Chemical class 0.000 claims 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- 229960004618 prednisone Drugs 0.000 description 15
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- NOGFHTGYPKWWRX-UHFFFAOYSA-N 2,2,6,6-tetramethyloxan-4-one Chemical compound CC1(C)CC(=O)CC(C)(C)O1 NOGFHTGYPKWWRX-UHFFFAOYSA-N 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 239000003246 corticosteroid Substances 0.000 description 4
- 229960001334 corticosteroids Drugs 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 150000002576 ketones Chemical class 0.000 description 3
- PIDANAQULIKBQS-RNUIGHNZSA-N meprednisone Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1C[C@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)CC2=O PIDANAQULIKBQS-RNUIGHNZSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- WRIKHQLVHPKCJU-UHFFFAOYSA-N sodium bis(trimethylsilyl)amide Chemical compound C[Si](C)(C)N([Na])[Si](C)(C)C WRIKHQLVHPKCJU-UHFFFAOYSA-N 0.000 description 3
- 238000004809 thin layer chromatography Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229940126062 Compound A Drugs 0.000 description 2
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001558 benzoic acid derivatives Chemical class 0.000 description 2
- UREBDLICKHMUKA-DVTGEIKXSA-N betamethasone Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)C[C@@H]2O UREBDLICKHMUKA-DVTGEIKXSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- SFDZETWZUCDYMD-UHFFFAOYSA-N monosodium acetylide Chemical compound [Na+].[C-]#C SFDZETWZUCDYMD-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- UJTRRNALUYKHQE-UHFFFAOYSA-N sodium;diphenylmethylbenzene Chemical compound [Na+].C1=CC=CC=C1[C-](C=1C=CC=CC=1)C1=CC=CC=C1 UJTRRNALUYKHQE-UHFFFAOYSA-N 0.000 description 2
- SVYCRJXQZUCUND-PQXSVQADSA-N (6s,8s,9s,10r,13s,14s,17r)-17-hydroxy-17-(2-hydroxyacetyl)-6,10,13-trimethyl-6,7,8,9,12,14,15,16-octahydrocyclopenta[a]phenanthrene-3,11-dione Chemical compound C([C@@]12C)=CC(=O)C=C1[C@@H](C)C[C@@H]1[C@@H]2C(=O)C[C@]2(C)[C@@](O)(C(=O)CO)CC[C@H]21 SVYCRJXQZUCUND-PQXSVQADSA-N 0.000 description 1
- PIDANAQULIKBQS-VUOZLLHNSA-N (8s,9s,10r,13s,14s,16r,17r)-17-hydroxy-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,9,12,14,15,16-octahydrocyclopenta[a]phenanthrene-3,11-dione Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1C[C@@H](C)[C@@](C(=O)CO)(O)[C@@]1(C)CC2=O PIDANAQULIKBQS-VUOZLLHNSA-N 0.000 description 1
- RSRDWHPVTMQUGZ-OZIWPBGVSA-N 1-[(8r,9s,10s,13s,14s,17s)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]ethanone Chemical class C1CC2CCCC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H](C(=O)C)[C@@]1(C)CC2 RSRDWHPVTMQUGZ-OZIWPBGVSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- RJKFOVLPORLFTN-LEKSSAKUSA-N Progesterone Natural products C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H](C(=O)C)[C@@]1(C)CC2 RJKFOVLPORLFTN-LEKSSAKUSA-N 0.000 description 1
- KOOADCGQJDGAGA-UHFFFAOYSA-N [amino(dimethyl)silyl]methane Chemical class C[Si](C)(C)N KOOADCGQJDGAGA-UHFFFAOYSA-N 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 150000000476 acetylides Chemical class 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 230000010933 acylation Effects 0.000 description 1
- 238000005917 acylation reaction Methods 0.000 description 1
- 239000003470 adrenal cortex hormone Substances 0.000 description 1
- 229910000102 alkali metal hydride Inorganic materials 0.000 description 1
- 150000008046 alkali metal hydrides Chemical class 0.000 description 1
- NBZANZVJRKXVBH-GYDPHNCVSA-N alpha-Cryptoxanthin Natural products O[C@H]1CC(C)(C)C(/C=C/C(=C\C=C\C(=C/C=C/C=C(\C=C\C=C(/C=C/[C@H]2C(C)=CCCC2(C)C)\C)/C)\C)/C)=C(C)C1 NBZANZVJRKXVBH-GYDPHNCVSA-N 0.000 description 1
- 239000000538 analytical sample Substances 0.000 description 1
- 150000001440 androstane derivatives Chemical class 0.000 description 1
- 150000001441 androstanes Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- RKHQGWMMUURILY-UHRZLXHJSA-N cortivazol Chemical compound C([C@H]1[C@@H]2C[C@H]([C@]([C@@]2(C)C[C@H](O)[C@@H]1[C@@]1(C)C2)(O)C(=O)COC(C)=O)C)=C(C)C1=CC1=C2C=NN1C1=CC=CC=C1 RKHQGWMMUURILY-UHRZLXHJSA-N 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000007336 electrophilic substitution reaction Methods 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000012025 fluorinating agent Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229960001810 meprednisone Drugs 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 239000012038 nucleophile Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 125000004043 oxo group Chemical group O=* 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 229960005205 prednisolone Drugs 0.000 description 1
- 150000003128 pregnanes Chemical class 0.000 description 1
- 238000012746 preparative thin layer chromatography Methods 0.000 description 1
- 229960003387 progesterone Drugs 0.000 description 1
- 239000000186 progesterone Substances 0.000 description 1
- 150000003146 progesterones Chemical class 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010898 silica gel chromatography Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 125000005039 triarylmethyl group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J21/00—Normal steroids containing carbon, hydrogen, halogen or oxygen having an oxygen-containing hetero ring spiro-condensed with the cyclopenta(a)hydrophenanthrene skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Steroid Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5742569 | 1969-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2057541A1 true DE2057541A1 (de) | 1971-06-03 |
Family
ID=10479160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702057541 Pending DE2057541A1 (de) | 1969-11-24 | 1970-11-23 | Verfahren zur Enolisierung von Steroiden |
Country Status (11)
-
1970
- 1970-10-23 BE BE70@@@@@@@@A patent/BE759289A/xx unknown
- 1970-11-23 ZA ZA707908A patent/ZA707908B/xx unknown
- 1970-11-23 NL NL7017087A patent/NL7017087A/xx unknown
- 1970-11-23 CH CH1731370A patent/CH571540A5/xx not_active IP Right Cessation
- 1970-11-23 US US92216A patent/US3705893A/en not_active Expired - Lifetime
- 1970-11-23 DK DK594370AA patent/DK134071B/da unknown
- 1970-11-23 IL IL35706A patent/IL35706A/en unknown
- 1970-11-23 FR FR7041982A patent/FR2072246A5/fr not_active Expired
- 1970-11-23 DE DE19702057541 patent/DE2057541A1/de active Pending
- 1970-11-23 JP JP45102645A patent/JPS5111112B1/ja active Pending
- 1970-11-24 GB GB5742569A patent/GB1325004A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE759289A (fr) | 1971-05-24 |
| GB1325004A (en) | 1973-08-01 |
| ZA707908B (en) | 1971-11-24 |
| DK134071C (enrdf_load_stackoverflow) | 1977-02-07 |
| US3705893A (en) | 1972-12-12 |
| CH571540A5 (enrdf_load_stackoverflow) | 1976-01-15 |
| JPS5111112B1 (enrdf_load_stackoverflow) | 1976-04-08 |
| FR2072246A5 (enrdf_load_stackoverflow) | 1971-09-24 |
| IL35706A0 (en) | 1971-01-28 |
| IL35706A (en) | 1974-11-29 |
| DK134071B (da) | 1976-09-06 |
| NL7017087A (enrdf_load_stackoverflow) | 1971-05-26 |
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