GB1205839A - A method of manufacture of 1 cis, 2 cis, 3 cis, 4 cis, cyclopentane-tetracarboxylic acid and its dianhydride - Google Patents
A method of manufacture of 1 cis, 2 cis, 3 cis, 4 cis, cyclopentane-tetracarboxylic acid and its dianhydrideInfo
- Publication number
- GB1205839A GB1205839A GB4375368A GB4375368A GB1205839A GB 1205839 A GB1205839 A GB 1205839A GB 4375368 A GB4375368 A GB 4375368A GB 4375368 A GB4375368 A GB 4375368A GB 1205839 A GB1205839 A GB 1205839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cis
- tetracarboxylic acid
- hno
- acid
- cyclopentane
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/316—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with oxides of nitrogen or nitrogen-containing mineral acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
Abstract
1,205,839. 1-Cis, 2-cis, 3-cis,4-cis cyclopentane tetracarboxylic acid. SOC. CHIMIQUE DES CHARBONNAGES. 13 Sept., 1968 [14 Sept., 1967], No. 43753/68. Heading C2C. A process for the preparation of 1-cis, 2-cis, 3-cis, 4-cis cyclopentane tetracarboxylic acid by nitric acid oxidation of endo-methylene 3,6- tetrahydro-1,2,3,6-phthalic anhydride or of the corresponding acid is characterized by the following reaction conditions: (a) the concentration of HNO 3 is 65-70%, (b) the molar ratio of HNO 3 to the phthalic anhydride or acid is from 10 to 20, (c) the temperature of the reaction is from 30‹ to 60‹ C., (d) the reaction time is greater than 12 hours, preferably 24 to 48 hours and (e) the crystals of the product are separated from the mother liquor and are washed with conc. HNO 3 (50-70%).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR121057 | 1967-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1205839A true GB1205839A (en) | 1970-09-16 |
Family
ID=8638350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4375368A Expired GB1205839A (en) | 1967-09-14 | 1968-09-13 | A method of manufacture of 1 cis, 2 cis, 3 cis, 4 cis, cyclopentane-tetracarboxylic acid and its dianhydride |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE720180A (en) |
CH (1) | CH487825A (en) |
DE (1) | DE1793414A1 (en) |
ES (1) | ES358157A1 (en) |
FR (1) | FR1555625A (en) |
GB (1) | GB1205839A (en) |
NL (1) | NL6813115A (en) |
-
1967
- 1967-09-14 FR FR1555625D patent/FR1555625A/fr not_active Expired
-
1968
- 1968-08-30 BE BE720180D patent/BE720180A/xx unknown
- 1968-09-03 CH CH1319668A patent/CH487825A/en not_active IP Right Cessation
- 1968-09-13 DE DE19681793414 patent/DE1793414A1/en active Pending
- 1968-09-13 GB GB4375368A patent/GB1205839A/en not_active Expired
- 1968-09-13 NL NL6813115A patent/NL6813115A/xx not_active Application Discontinuation
- 1968-09-14 ES ES358157A patent/ES358157A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL6813115A (en) | 1969-03-18 |
ES358157A1 (en) | 1970-04-16 |
DE1793414A1 (en) | 1972-02-10 |
CH487825A (en) | 1970-03-31 |
BE720180A (en) | 1969-02-28 |
FR1555625A (en) | 1969-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
435 | Patent endorsed 'licences of right' on the date specified (sect. 35/1949) | ||
PCNP | Patent ceased through non-payment of renewal fee |