RO92318B - Process for preparing cyclic imides of dicarboxylic acids - Google Patents
Process for preparing cyclic imides of dicarboxylic acidsInfo
- Publication number
- RO92318B RO92318B RO119176A RO11917685A RO92318B RO 92318 B RO92318 B RO 92318B RO 119176 A RO119176 A RO 119176A RO 11917685 A RO11917685 A RO 11917685A RO 92318 B RO92318 B RO 92318B
- Authority
- RO
- Romania
- Prior art keywords
- dicarboxylic acids
- reaction
- urea
- cyclic imides
- cyclic
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/44—Iso-indoles; Hydrogenated iso-indoles
- C07D209/48—Iso-indoles; Hydrogenated iso-indoles with oxygen atoms in positions 1 and 3, e.g. phthalimide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
- Pyrrole Compounds (AREA)
Abstract
Inventia trateaza prepararea imidelor ciclice ale acizilor dicarboxilici, prin reactia dintre anhidride ciclice ale acizilor dicarboxilici si uree, fara utilizarea unui solvent si fara a folosi un exces de uree. In topitura anhidridei de acid dicarboxilic ureea este adaugata treptat, mentinându-se mediul de reactie acid, sfârsitul reactiei fiind indicat de valoarea pH-ului. In acelasi timp, gazele si vaporii formati în cursul reactiei sunt captati în reactie. Avantajele inventiei sunt, printre altele, asigurarea lui la un randament marit si protejarea mediului ambiant de poluare.The invention deals with the preparation of cyclic cyclic imides of dicarboxylic acids by reacting cyclic anhydrides of dicarboxylic acids and urea without the use of a solvent and without the use of an excess of urea. In the melting of the dicarboxylic acid anhydride, the urea is gradually added while maintaining the acidic reaction medium, the end of the reaction being indicated by the pH value. At the same time, the gases and vapors formed during the reaction are captured in the reaction. The advantages of the invention are, inter alia, its assurance of increased efficiency and protection of the pollution environment.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU842328A HU192035B (en) | 1984-06-18 | 1984-06-18 | Process for production of ftalimid and tetrahydroftalimid |
Publications (2)
Publication Number | Publication Date |
---|---|
RO92318A RO92318A (en) | 1987-08-31 |
RO92318B true RO92318B (en) | 1987-09-01 |
Family
ID=10958856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RO119176A RO92318B (en) | 1984-06-18 | 1985-06-17 | Process for preparing cyclic imides of dicarboxylic acids |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS6112661A (en) |
BG (1) | BG43864A3 (en) |
CS (1) | CS250691B2 (en) |
DD (1) | DD234002A5 (en) |
DE (1) | DE3518619A1 (en) |
FR (1) | FR2565975B1 (en) |
HU (1) | HU192035B (en) |
IL (1) | IL75199A0 (en) |
RO (1) | RO92318B (en) |
SU (1) | SU1355124A3 (en) |
YU (1) | YU99085A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110804011A (en) * | 2019-11-12 | 2020-02-18 | 内蒙古科迈化工有限公司 | Method for synthesizing phthalimide |
CN111454196A (en) * | 2020-05-12 | 2020-07-28 | 河南源博新材料有限公司 | Production and synthesis method of cis-1, 2,3, 6-tetrahydrophthalimide |
CN115353481B (en) * | 2022-08-31 | 2024-03-29 | 宁夏格瑞精细化工有限公司 | Catalytic synthesis method of cis-1, 2,3, 6-tetrahydrophthalimide |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3819648A (en) * | 1971-11-12 | 1974-06-25 | Dawe Labor Inc S | Production of phthalimide |
-
1984
- 1984-06-18 HU HU842328A patent/HU192035B/en not_active IP Right Cessation
-
1985
- 1985-05-15 IL IL75199A patent/IL75199A0/en unknown
- 1985-05-23 DE DE19853518619 patent/DE3518619A1/en not_active Withdrawn
- 1985-05-29 FR FR8508037A patent/FR2565975B1/en not_active Expired
- 1985-06-10 DD DD85277208A patent/DD234002A5/en not_active IP Right Cessation
- 1985-06-13 YU YU00990/85A patent/YU99085A/en unknown
- 1985-06-17 BG BG070701A patent/BG43864A3/en unknown
- 1985-06-17 RO RO119176A patent/RO92318B/en unknown
- 1985-06-17 JP JP60130066A patent/JPS6112661A/en active Pending
- 1985-06-17 SU SU853909600A patent/SU1355124A3/en active
- 1985-06-18 CS CS854451A patent/CS250691B2/en unknown
Also Published As
Publication number | Publication date |
---|---|
HU192035B (en) | 1987-04-28 |
FR2565975B1 (en) | 1988-08-26 |
DD234002A5 (en) | 1986-03-19 |
RO92318A (en) | 1987-08-31 |
IL75199A0 (en) | 1985-09-29 |
CS250691B2 (en) | 1987-05-14 |
DE3518619A1 (en) | 1985-12-19 |
YU99085A (en) | 1987-10-31 |
SU1355124A3 (en) | 1987-11-23 |
FR2565975A1 (en) | 1985-12-20 |
BG43864A3 (en) | 1988-08-15 |
JPS6112661A (en) | 1986-01-21 |
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