RO92318B - Process for preparing cyclic imides of dicarboxylic acids - Google Patents

Process for preparing cyclic imides of dicarboxylic acids

Info

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
Application number
RO119176A
Other languages
Romanian (ro)
Other versions
RO92318A (en
Inventor
Reti Tamas
Maszaros Pal
Szell Laszlo
Kovacs Huba
Toth Gabor
Horvath Iren
Legradi Laszlo
Original Assignee
Nitrokemia Ipartelepek Fuzfogyartelep
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitrokemia Ipartelepek Fuzfogyartelep filed Critical Nitrokemia Ipartelepek Fuzfogyartelep
Publication of RO92318A publication Critical patent/RO92318A/en
Publication of RO92318B publication Critical patent/RO92318B/en

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.

RO119176A 1984-06-18 1985-06-17 Process for preparing cyclic imides of dicarboxylic acids RO92318B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819648A (en) * 1971-11-12 1974-06-25 Dawe Labor Inc S Production of phthalimide

Also Published As

Publication number Publication date
DD234002A5 (en) 1986-03-19
JPS6112661A (en) 1986-01-21
FR2565975B1 (en) 1988-08-26
YU99085A (en) 1987-10-31
DE3518619A1 (en) 1985-12-19
FR2565975A1 (en) 1985-12-20
SU1355124A3 (en) 1987-11-23
CS250691B2 (en) 1987-05-14
BG43864A3 (en) 1988-08-15
RO92318A (en) 1987-08-31
HU192035B (en) 1987-04-28
IL75199A0 (en) 1985-09-29

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