DE2722307A1 - Verfahren zur herstellung von pyrazinen - Google Patents
Verfahren zur herstellung von pyrazinenInfo
- Publication number
- DE2722307A1 DE2722307A1 DE19772722307 DE2722307A DE2722307A1 DE 2722307 A1 DE2722307 A1 DE 2722307A1 DE 19772722307 DE19772722307 DE 19772722307 DE 2722307 A DE2722307 A DE 2722307A DE 2722307 A1 DE2722307 A1 DE 2722307A1
- Authority
- DE
- Germany
- Prior art keywords
- catalyst
- pyrazines
- reaction
- zinc
- dipl
- 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.)
- Granted
Links
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 title description 15
- 238000004519 manufacturing process Methods 0.000 title description 3
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 239000003054 catalyst Substances 0.000 claims description 31
- 150000003216 pyrazines Chemical class 0.000 claims description 24
- 150000004985 diamines Chemical class 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 150000002009 diols Chemical class 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 2
- 239000005909 Kieselgur Substances 0.000 claims description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- HHUIAYDQMNHELC-UHFFFAOYSA-N [O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O HHUIAYDQMNHELC-UHFFFAOYSA-N 0.000 claims 1
- 239000003701 inert diluent Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 239000007858 starting material Substances 0.000 description 11
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 239000006227 byproduct Substances 0.000 description 9
- -1 hydrocarbon radical Chemical class 0.000 description 8
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- CAWHJQAVHZEVTJ-UHFFFAOYSA-N methylpyrazine Chemical compound CC1=CN=CC=N1 CAWHJQAVHZEVTJ-UHFFFAOYSA-N 0.000 description 6
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 5
- BMRWNKZVCUKKSR-UHFFFAOYSA-N butane-1,2-diol Chemical compound CCC(O)CO BMRWNKZVCUKKSR-UHFFFAOYSA-N 0.000 description 4
- OWBTYPJTUOEWEK-UHFFFAOYSA-N butane-2,3-diol Chemical compound CC(O)C(C)O OWBTYPJTUOEWEK-UHFFFAOYSA-N 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- KVFIJIWMDBAGDP-UHFFFAOYSA-N ethylpyrazine Chemical compound CCC1=CN=CC=N1 KVFIJIWMDBAGDP-UHFFFAOYSA-N 0.000 description 4
- 150000004885 piperazines Chemical class 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 3
- ULEAQRIQMIQDPJ-UHFFFAOYSA-N butane-1,2-diamine Chemical compound CCC(N)CN ULEAQRIQMIQDPJ-UHFFFAOYSA-N 0.000 description 2
- GHWVXCQZPNWFRO-UHFFFAOYSA-N butane-2,3-diamine Chemical compound CC(N)C(C)N GHWVXCQZPNWFRO-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- PFURGBBHAOXLIO-UHFFFAOYSA-N cyclohexane-1,2-diol Chemical compound OC1CCCCC1O PFURGBBHAOXLIO-UHFFFAOYSA-N 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- PWMWNFMRSKOCEY-UHFFFAOYSA-N 1-Phenyl-1,2-ethanediol Chemical compound OCC(O)C1=CC=CC=C1 PWMWNFMRSKOCEY-UHFFFAOYSA-N 0.000 description 1
- WAVOLMBVDCRBGR-UHFFFAOYSA-N 2,5-Diaethyl-pyrazin Natural products CCC1=CN=C(CC)C=N1 WAVOLMBVDCRBGR-UHFFFAOYSA-N 0.000 description 1
- QDWOWLUANUBTGE-UHFFFAOYSA-N 2,6-Diethylpyrazine Chemical compound CCC1=CN=CC(CC)=N1 QDWOWLUANUBTGE-UHFFFAOYSA-N 0.000 description 1
- AXNUJYHFQHQZBE-UHFFFAOYSA-N 3-methylbenzene-1,2-diamine Chemical compound CC1=CC=CC(N)=C1N AXNUJYHFQHQZBE-UHFFFAOYSA-N 0.000 description 1
- HJJZIMFAIMUSBW-UHFFFAOYSA-N 3-methylbutane-1,2-diol Chemical compound CC(C)C(O)CO HJJZIMFAIMUSBW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- SSJXIUAHEKJCMH-UHFFFAOYSA-N cyclohexane-1,2-diamine Chemical compound NC1CCCCC1N SSJXIUAHEKJCMH-UHFFFAOYSA-N 0.000 description 1
- VCVOSERVUCJNPR-UHFFFAOYSA-N cyclopentane-1,2-diol Chemical compound OC1CCCC1O VCVOSERVUCJNPR-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- POFSNPPXJUQANW-UHFFFAOYSA-N hexane-3,4-diol Chemical compound CCC(O)C(O)CC POFSNPPXJUQANW-UHFFFAOYSA-N 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- WCVRQHFDJLLWFE-UHFFFAOYSA-N pentane-1,2-diol Chemical compound CCCC(O)CO WCVRQHFDJLLWFE-UHFFFAOYSA-N 0.000 description 1
- XLMFDCKSFJWJTP-UHFFFAOYSA-N pentane-2,3-diol Chemical compound CCC(O)C(C)O XLMFDCKSFJWJTP-UHFFFAOYSA-N 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D241/00—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
- C07D241/02—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings not condensed with other rings
- C07D241/10—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D241/12—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D241/00—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
- C07D241/36—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
- C07D241/38—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
- C07D241/40—Benzopyrazines
- C07D241/42—Benzopyrazines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11171776A JPS5337675A (en) | 1976-09-20 | 1976-09-20 | Production of pyrazines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2722307A1 true DE2722307A1 (de) | 1978-03-23 |
| DE2722307C2 DE2722307C2 (OSRAM) | 1987-09-03 |
Family
ID=14568367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772722307 Granted DE2722307A1 (de) | 1976-09-20 | 1977-05-17 | Verfahren zur herstellung von pyrazinen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4097478A (OSRAM) |
| JP (1) | JPS5337675A (OSRAM) |
| DE (1) | DE2722307A1 (OSRAM) |
| GB (1) | GB1565117A (OSRAM) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988000189A1 (en) * | 1986-07-08 | 1988-01-14 | Bracco Industria Chimica S.P.A. | A process for the preparation of nitrogen-containing heterocyclic compounds |
| US4966970A (en) * | 1987-12-31 | 1990-10-30 | Korea Research Institute Of Chemical Technology | Process for manufacturing pyrazines |
| BE1010032A3 (fr) * | 1995-08-04 | 1997-11-04 | Koei Chemical Co | Procede de production de composes de la pyrazine. |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788289A (en) * | 1986-10-24 | 1988-11-29 | Texaco Inc. | Process for preparing pyrazines from hydroxyamines |
| US5304648A (en) * | 1992-09-29 | 1994-04-19 | Nestec S.A. | Pyrazine preparation |
| EP1357193A1 (en) * | 2002-04-22 | 2003-10-29 | Societe Des Produits Nestle S.A. | Preparation of pyrazines |
| JP2005320249A (ja) * | 2002-05-01 | 2005-11-17 | Banyu Pharmaceut Co Ltd | 2−アミノピラジン誘導体の製造方法 |
| JP5271721B2 (ja) * | 2008-01-23 | 2013-08-21 | 株式会社半導体エネルギー研究所 | トリアリールピラジン誘導体の製造方法 |
| CN102977037B (zh) * | 2012-11-21 | 2015-02-11 | 西安近代化学研究所 | 吡嗪和乙二胺混合物的分离方法 |
| CN103691443A (zh) * | 2013-12-13 | 2014-04-02 | 广西大学 | 一种用于合成2,5-二甲基吡嗪的催化剂及其制备方法 |
| DE202021104269U1 (de) | 2021-08-10 | 2021-08-25 | DÖHLER GmbH | Formulierung zur Aromatisierung eines Lebensmittelproduktes |
| DE102022132286A1 (de) | 2022-12-06 | 2024-06-06 | DÖHLER GmbH | Formulierung zur Aromatisierung eines Lebensmittelproduktes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3219707A (en) * | 1957-11-27 | 1965-11-23 | Wyandotte Chemicals Corp | Production of diamines |
| DE2140649C3 (de) | 1971-08-13 | 1981-02-19 | Chemische Werke Huels Ag, 4370 Marl | Verfahren zur Herstellung von Tetraalkylpyrazinen |
| JPS5343512B2 (OSRAM) * | 1973-03-27 | 1978-11-20 |
-
1976
- 1976-09-20 JP JP11171776A patent/JPS5337675A/ja active Granted
-
1977
- 1977-03-31 US US05/783,172 patent/US4097478A/en not_active Expired - Lifetime
- 1977-05-17 DE DE19772722307 patent/DE2722307A1/de active Granted
- 1977-09-19 GB GB38946/77A patent/GB1565117A/en not_active Expired
Non-Patent Citations (5)
| Title |
|---|
| Advances in Heterocyclic Chemistry, 14, 1972, S. 112-119 * |
| C.A. 79, 1973, Nr. 17714q * |
| C.A. 82, 1975, Nr. 171053s * |
| Chemical Reviews 40, 1947, S. 318 * |
| RÖMPP: 1973, S. 1813 rechte Spalte * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988000189A1 (en) * | 1986-07-08 | 1988-01-14 | Bracco Industria Chimica S.P.A. | A process for the preparation of nitrogen-containing heterocyclic compounds |
| US4966970A (en) * | 1987-12-31 | 1990-10-30 | Korea Research Institute Of Chemical Technology | Process for manufacturing pyrazines |
| BE1010032A3 (fr) * | 1995-08-04 | 1997-11-04 | Koei Chemical Co | Procede de production de composes de la pyrazine. |
| DE19629258B4 (de) * | 1995-08-04 | 2006-05-24 | Koei Chemical Co., Ltd. | Verfahren zur Herstellung von Pyrazinverbindungen |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2722307C2 (OSRAM) | 1987-09-03 |
| JPS541318B2 (OSRAM) | 1979-01-23 |
| GB1565117A (en) | 1980-04-16 |
| JPS5337675A (en) | 1978-04-06 |
| US4097478A (en) | 1978-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69215009T2 (de) | Katalytische Oxidation des Äthans zur Essigsäure | |
| DE2722307A1 (de) | Verfahren zur herstellung von pyrazinen | |
| EP0071904A1 (de) | Neue Diglycidyl-substituierte heterocyclische Verbindungen, Verfahren zu ihrer Herstellung und ihre Verwendung in Arzneimittelzubereitungen mit cytostatischer Wirksamkeit | |
| DE1944925C3 (de) | Verfahren zur Herstellung einer molybdänorganischen Verbindung | |
| EP3596034B1 (de) | Verfahren zur chemischen umsetzung von zuckern oder zuckeralkoholen zu glykolen | |
| DE2544761A1 (de) | Promotierte nickelskelett-katalysatoren | |
| DE2020865A1 (de) | Verfahren zur Herstellung von alpha,ss-ungesaettigten Carbonylverbindungen | |
| DE2551055A1 (de) | Verfahren zur herstellung von 1,3- oder 1,4-bis-(aminomethyl)-cyclohexan | |
| DE2331878B2 (de) | Verfahren zur herstellung von diphenylamin und dessen derivaten | |
| DE3856098T2 (de) | Verfahren zur selektiven Reduktion von 2-Chinoxalinol-4-Oxiden zu 2-Chinoxalinolen | |
| DE2140649C3 (de) | Verfahren zur Herstellung von Tetraalkylpyrazinen | |
| DE2528365A1 (de) | Verfahren zur herstellung von 1,3-bis(2-chloraethyl)-1-nitrosoharnstoff | |
| DE2654928C3 (de) | Verfahren zur Herstellung von N-methylierten Harnstoffen oder Alkylenharnstoffen | |
| DE4222152A1 (de) | Verfahren zur Herstellung von 2-Chlor-5-aminomethyl-pyridin | |
| DE1545763A1 (de) | Verfahren zur Herstellung von Dihydrovinblastin und Dihydrodesmethylvinblastin | |
| CH660361A5 (de) | Verfahren zur herstellung von 2,6-difluorbenzonitril. | |
| DE2234202A1 (de) | Verfahren zur herstellung von oxoalkylxanthinen | |
| DE1954274A1 (de) | Verfahren zur Herstellung von Anilin aus Phenol | |
| AT215976B (de) | Verfahren zur Herstellung von Cyclohexanon | |
| DE19704305B4 (de) | Verfahren zur Synthese von Tetraacetyldibenzylhexaazaisowurtzitan | |
| DE2328605C2 (de) | Verfahren zur Herstellung eines Diastereoisomerengemisches von Zearalanol | |
| DE1095275B (de) | Verfahren zur Herstellung von Cyclohexanon aus Cyclohexylamin | |
| DE2639702A1 (de) | Verfahren zur herstellung von 2,3-cycloalkenopyridinen | |
| DE1268147B (de) | Verfahren zur Herstellung von Gemischen aus 2, 5-Dimethylpyrazin und cis- und trans-2, 5-Dimethylpiperazin | |
| DE2219168A1 (de) | 2 Phenyl butanale und Verfahren zu deren Herstellung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8128 | New person/name/address of the agent |
Representative=s name: STREHL, P., DIPL.-ING. DIPL.-WIRTSCH.-ING. SCHUEBE |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |