GB875957A - Process for preparing hexachloroendomethylenetetrahydrophthalan - Google Patents
Process for preparing hexachloroendomethylenetetrahydrophthalanInfo
- Publication number
- GB875957A GB875957A GB6116/59A GB611659A GB875957A GB 875957 A GB875957 A GB 875957A GB 6116/59 A GB6116/59 A GB 6116/59A GB 611659 A GB611659 A GB 611659A GB 875957 A GB875957 A GB 875957A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetrahydrophthalan
- endomethylene
- reaction mixture
- acid catalyst
- hexachloroendomethylenetetrahydrophthalan
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/93—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems condensed with a ring other than six-membered
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
4,5,6,7,10,10-Hexachloro-4,7-endomethylene-4,7,8, 9-tetrahydrophthalan, of formula <FORM:0875957/IV (b)/1> is prepared in a single step by heating hexachlorocyclopentadiene with 1,4-dihydroxybut2-ene in an inert solvent in the presence of a strong acid catalyst and removing water from the reaction mixture as it is formed. Preferably the reaction is carried out in the presence of up to 5% of acid catalyst, based on the diol, and at 100-235 DEG C. Preferred solvents are C4-C10 alcohols and chlorinated hydrocarbons such as tetrachloroethane. Specified acid catalysts are sulphuric, hydrochloric, phosphoric, hydro-bromic, hydriodic and toluene sulphonic acids. The product separates out as the reaction mixture is cooled, and may be further chlorinated to give 1,3,4,5,6,7,10,10-octachloro-4,7 - endomethylene-4,7,8,9-tetrahydrophthalan (the insecticide "Compound 6700"). Specification 772,212 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US875957XA | 1958-03-24 | 1958-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB875957A true GB875957A (en) | 1961-08-23 |
Family
ID=22206124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6116/59A Expired GB875957A (en) | 1958-03-24 | 1959-02-23 | Process for preparing hexachloroendomethylenetetrahydrophthalan |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB875957A (en) |
-
1959
- 1959-02-23 GB GB6116/59A patent/GB875957A/en not_active Expired
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