JPS5555132A - Preparation of 2,3-dihydroxy-1,4-naphthoquinone - Google Patents
Preparation of 2,3-dihydroxy-1,4-naphthoquinoneInfo
- Publication number
- JPS5555132A JPS5555132A JP12741378A JP12741378A JPS5555132A JP S5555132 A JPS5555132 A JP S5555132A JP 12741378 A JP12741378 A JP 12741378A JP 12741378 A JP12741378 A JP 12741378A JP S5555132 A JPS5555132 A JP S5555132A
- Authority
- JP
- Japan
- Prior art keywords
- naphthoquinone
- dihydroxy
- dealkylation
- dialkoxy
- pref
- 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.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To prepare the title compound having excellent purity and color tone, and useful as a gelling agent and polymerization inhibitor of styrene, etc., by the dealkylation of an easily synthesizable 2,3-dialkoxy-1,4-naphtoquinone with a Lewis acid in an organic solvent.
CONSTITUTION: 2,3-Dihydroxy-1,4-naphthoquinone is prepared by the dealkylation of 2,3-dialkoxy-1,4-naphthoquinone (pref. 2,3-dimethoxy-1,4-naphthoquinone obtained from 2,3-dichloro-1,4-naphthoquinone and the corresponding alcohol at low cost) with a Lewis acid (e.g. AlCl3 and BF3), in an organic solvent (pref. a solvent of Friedel-Crafts reaction, e.g. nitrobenzene, CCl4 etc.).
USE: Gelling agent of unsaturated polyesters.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12741378A JPS5555132A (en) | 1978-10-18 | 1978-10-18 | Preparation of 2,3-dihydroxy-1,4-naphthoquinone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12741378A JPS5555132A (en) | 1978-10-18 | 1978-10-18 | Preparation of 2,3-dihydroxy-1,4-naphthoquinone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5555132A true JPS5555132A (en) | 1980-04-22 |
Family
ID=14959346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12741378A Pending JPS5555132A (en) | 1978-10-18 | 1978-10-18 | Preparation of 2,3-dihydroxy-1,4-naphthoquinone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5555132A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107698434A (en) * | 2016-08-09 | 2018-02-16 | 常州高新技术产业开发区三维工业技术研究所有限公司 | A kind of synthesis technique of Rhein |
-
1978
- 1978-10-18 JP JP12741378A patent/JPS5555132A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107698434A (en) * | 2016-08-09 | 2018-02-16 | 常州高新技术产业开发区三维工业技术研究所有限公司 | A kind of synthesis technique of Rhein |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54130544A (en) | Preparation of hexamethyltetraline | |
JPS5555132A (en) | Preparation of 2,3-dihydroxy-1,4-naphthoquinone | |
JPS56138140A (en) | Preparation of 2- p-halomethylphenyl propionic acid or its ester | |
Saito et al. | Reactivities of stable rotamers. XI. Rotamer distributions and some addition reactions to the carbonyl in 9-(2-(substituted carbonyl)-1-naphthyl) fluorene rotamers. | |
JPS53127409A (en) | Preparation of unsaturated ester | |
JPS55110108A (en) | Preparation of cyclopentadiene copolymer | |
JPS5424821A (en) | Preparation of fluoric acid fluoride containing ester group | |
JPS5424818A (en) | Preparation of high purity maleic acid monoalcohol ester | |
JPS5287157A (en) | Preparation of provitamin d compounds | |
JPS5424810A (en) | Synthesis of carboxylic acid ester | |
JPS5273825A (en) | Preparation of organic phosphorous compounds | |
JPS52125138A (en) | Preparation of aromatice aldehydes | |
JPS5517351A (en) | Production of sesquiterpene derivative | |
JPS5675448A (en) | Preparation of cis-3-alkenals | |
JPS5419964A (en) | Preparation of thiophene-substituted fatty acid halode | |
JPS54128504A (en) | Preparation of olefin oligomers | |
JPS55108898A (en) | 25-hydroxy-24-oxocholesterol derivative and its preparation | |
JPS53103412A (en) | Preparation of farnesyl acetic acid or its ester | |
FI95564B (en) | Process for the preparation of 1,1-bis (4-chlorophenyl) -2,2,2-trichloroethanol | |
JPS5273842A (en) | Preparation of 2,2-dimethyl-3-)alpha-hydroxy-alphe-trihalogenomethylme thyl) -cyclopropane carboxylic acid derivatives | |
JPS55153777A (en) | Improved method of preparation of 3-methyl-3-(substituted phenyl)-glycidic ester | |
JPS53148519A (en) | Preparation of solid medicine containing gefarnate | |
JPS55153744A (en) | Preparation of farnesylacetic acid ester | |
JPS55160740A (en) | Preparation of cyclopentenolone | |
JPS54147178A (en) | Sublimable composition |