LV11831B - New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde - Google Patents
New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde Download PDFInfo
- Publication number
- LV11831B LV11831B LVP-97-54A LV970054A LV11831B LV 11831 B LV11831 B LV 11831B LV 970054 A LV970054 A LV 970054A LV 11831 B LV11831 B LV 11831B
- Authority
- LV
- Latvia
- Prior art keywords
- nitrobenzaldehyde
- dihydroxy
- zinc chloride
- ethoxy
- hydroxy
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/44—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by —CHO groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/12—Preparation of nitro compounds by reactions not involving the formation of nitro groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/16—Separation; Purification; Stabilisation; Use of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Saccharide Compounds (AREA)
Claims (10)
1 LV 11831 Izgudrojuma formula 1. Paņēmiens 3,4-dihidroksi-5-nitrobenzaldehīda iegūšanai, kas atšķiras ar to, ka 3-etoksi-4-hidroksi-5-nitrobenzaldehīdu apstrādā ar reaģentu, kas sastāv no cinka hlorīda, ūdens un hlorūdeņraža.
2. Paņēmiens pēc 1. punkta, kas atšķiras ar to, ka cinka hlorīds tiek ņemts no 1 līdz 25 kg uz 1 kg 3-etoksi-4-hidroksi-5-nitrobenzaldehīda.
3. Paņēmiens pēc 2. punkta, kas atšķiras ar to, ka cinka hlorīds tiek ņemts no 2,5 līdz 4 kg uz 1 kg 3-etoksi-4-hidroksi-5-nitrobenzaldehīda.
4. Paņēmiens pēc 1. punkta, kas atšķiras ar to, ka sālsskābe tiek ņemta no 0,17 līdz 0,6 L uz 1 kg cinka hlorīda.
5. Paņēmiens pēc 4. punkta, kas atšķiras ar to, ka sālsskābe tiek ņemta no 0,22 līdz 0,4 L uz 1 kg cinka hlorīda.
6. Paņēmiens pēc 1. punkta, kas atšķiras ar to, ka sālsskābes koncentrācija ir no 10 līdz 40%.
7. Paņēmiens pēc 6. punkta, kas atšķiras ar to, ka sālsskābes koncentrācija ir no 20 līdz 38%.
8. Paņēmiens pēc 1. punkta,'kas atšķiras arto, ka reakciju veic no 70 līdz 130 °C temperatūrā.
9. Paņēmiens pēc 8. punkta, kas atšķiras ar to, ka reakciju veic no 80 līdz 110 °C temperatūrā.
10. Paņēmiens pēc 1. punkta, kas atšķiras ar to, ka reakcijas jēlproduktu pārkristalizē no toluola.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9419274A GB9419274D0 (en) | 1994-09-23 | 1994-09-23 | New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
| PCT/FI1995/000513 WO1996009274A1 (en) | 1994-09-23 | 1995-09-20 | New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LV11831A LV11831A (lv) | 1997-08-20 |
| LV11831B true LV11831B (en) | 1997-12-20 |
Family
ID=10761838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LVP-97-54A LV11831B (en) | 1994-09-23 | 1997-04-03 | New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
Country Status (28)
| Country | Link |
|---|---|
| US (1) | US5710343A (lv) |
| EP (1) | EP0782559B1 (lv) |
| JP (1) | JP3717933B2 (lv) |
| KR (1) | KR100368163B1 (lv) |
| CN (1) | CN1064673C (lv) |
| AT (1) | ATE175660T1 (lv) |
| AU (1) | AU684672B2 (lv) |
| BG (1) | BG61912B1 (lv) |
| BR (1) | BR9508852A (lv) |
| CA (1) | CA2200227C (lv) |
| CZ (1) | CZ288684B6 (lv) |
| DE (1) | DE69507309T2 (lv) |
| DK (1) | DK0782559T3 (lv) |
| ES (1) | ES2127552T3 (lv) |
| GB (1) | GB9419274D0 (lv) |
| GR (1) | GR3029815T3 (lv) |
| HU (1) | HU224821B1 (lv) |
| IL (1) | IL115122A (lv) |
| LV (1) | LV11831B (lv) |
| MX (1) | MX9702064A (lv) |
| NO (1) | NO306670B1 (lv) |
| NZ (1) | NZ292187A (lv) |
| PL (1) | PL180016B1 (lv) |
| RO (1) | RO119540B1 (lv) |
| RU (1) | RU2130449C1 (lv) |
| SI (1) | SI9520102A (lv) |
| SK (1) | SK281789B6 (lv) |
| WO (1) | WO1996009274A1 (lv) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9419274D0 (en) * | 1994-09-23 | 1994-11-09 | Orion Yhtymae Oy | New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
| US8524746B2 (en) * | 2007-01-31 | 2013-09-03 | Bial-Portela & Ca., S.A. | Dosage regimen for COMT inhibitors |
| EP2251323B1 (en) | 2009-05-14 | 2014-04-23 | F.I.S.- Fabbrica Italiana Sintetici S.p.A. | Method for the purification of entacapone |
| CN102633646B (zh) * | 2012-04-10 | 2014-06-04 | 中国海洋大学 | 一种新的5-硝基水杨醛制备方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL279980A (lv) * | 1961-06-21 | |||
| FR1330382A (fr) * | 1961-06-21 | 1963-06-21 | Monsanto Chemicals | Procédé de clivage des éthers d'alcoyle o-hydroxyphényle et de préparation simultanée de composés 1-alkyl-2,3-dihydroxyphényliques |
| US4213920A (en) * | 1977-07-06 | 1980-07-22 | Ciba-Geigy Corporation | Process for the production of substituted benzaldehydes |
| DK175069B1 (da) * | 1986-03-11 | 2004-05-24 | Hoffmann La Roche | Pyrocatecholderivater |
| YU213587A (en) * | 1986-11-28 | 1989-06-30 | Orion Yhtymae Oy | Process for obtaining new pharmacologic active cateholic derivatives |
| DE4012008A1 (de) * | 1990-04-13 | 1991-10-17 | Bayer Ag | Verfahren zur herstellung von o-hydroxy-benzaldehyden |
| GB9113431D0 (en) * | 1991-06-20 | 1991-08-07 | Orion Yhytma Oy | Method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
| KR0143092B1 (ko) * | 1991-12-12 | 1998-07-15 | 장-끌로드 비에이으포스 | 7 위치에 치환된 벤질옥시이미노 라디칼을 함유하는 신규 세팔로스포린, 그의 제조 방법 및 의약으로서의 그의 용도 |
| GB9419274D0 (en) * | 1994-09-23 | 1994-11-09 | Orion Yhtymae Oy | New method for the preparation of 3,4-dihydroxy-5-nitrobenzaldehyde |
-
1994
- 1994-09-23 GB GB9419274A patent/GB9419274D0/en active Pending
-
1995
- 1995-05-22 KR KR1019970701878A patent/KR100368163B1/ko not_active IP Right Cessation
- 1995-08-31 IL IL11512295A patent/IL115122A/xx not_active IP Right Cessation
- 1995-09-20 BR BR9508852A patent/BR9508852A/pt not_active IP Right Cessation
- 1995-09-20 ES ES95930558T patent/ES2127552T3/es not_active Expired - Lifetime
- 1995-09-20 JP JP51063396A patent/JP3717933B2/ja not_active Expired - Fee Related
- 1995-09-20 HU HU9702258A patent/HU224821B1/hu unknown
- 1995-09-20 CA CA002200227A patent/CA2200227C/en not_active Expired - Fee Related
- 1995-09-20 MX MX9702064A patent/MX9702064A/es not_active IP Right Cessation
- 1995-09-20 AU AU33901/95A patent/AU684672B2/en not_active Ceased
- 1995-09-20 CN CN95195222A patent/CN1064673C/zh not_active Expired - Fee Related
- 1995-09-20 US US08/809,405 patent/US5710343A/en not_active Expired - Fee Related
- 1995-09-20 WO PCT/FI1995/000513 patent/WO1996009274A1/en active IP Right Grant
- 1995-09-20 SK SK378-97A patent/SK281789B6/sk unknown
- 1995-09-20 AT AT95930558T patent/ATE175660T1/de not_active IP Right Cessation
- 1995-09-20 RO RO97-00574A patent/RO119540B1/ro unknown
- 1995-09-20 CZ CZ1997800A patent/CZ288684B6/cs not_active IP Right Cessation
- 1995-09-20 SI SI9520102A patent/SI9520102A/sl not_active IP Right Cessation
- 1995-09-20 RU RU97106330A patent/RU2130449C1/ru not_active IP Right Cessation
- 1995-09-20 EP EP95930558A patent/EP0782559B1/en not_active Expired - Lifetime
- 1995-09-20 PL PL95319348A patent/PL180016B1/pl not_active IP Right Cessation
- 1995-09-20 DE DE69507309T patent/DE69507309T2/de not_active Expired - Fee Related
- 1995-09-20 NZ NZ292187A patent/NZ292187A/en unknown
- 1995-09-20 DK DK95930558T patent/DK0782559T3/da active
-
1997
- 1997-03-11 BG BG101309A patent/BG61912B1/bg unknown
- 1997-03-21 NO NO971325A patent/NO306670B1/no unknown
- 1997-04-03 LV LVP-97-54A patent/LV11831B/en unknown
-
1999
- 1999-03-30 GR GR990400905T patent/GR3029815T3/el unknown
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