JPS56167655A - Preparation of methylenedicarbanilate - Google Patents
Preparation of methylenedicarbanilateInfo
- Publication number
- JPS56167655A JPS56167655A JP7111980A JP7111980A JPS56167655A JP S56167655 A JPS56167655 A JP S56167655A JP 7111980 A JP7111980 A JP 7111980A JP 7111980 A JP7111980 A JP 7111980A JP S56167655 A JPS56167655 A JP S56167655A
- Authority
- JP
- Japan
- Prior art keywords
- formula
- carboxylic acid
- compound
- carbanilate
- hcho
- 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 obtain the titled compound which is an intermediate for preparing polyurethane in high conversion and yield, by reacting a carbanilate with HCHO in the presenc of a mineral acid in an aliphatic carboxylic acid and an anhydrate thereof as at least one component of a solvent.
CONSTITUTION: A carbanilate of formula I (R is 1W4C alkyl or phenyl; X, Y and Z are H, halogen, nitro, etc.), e.g. ethyl and methyl carbanilates, is reacted with HCHO in the presence of a mineral acid, e.g. H2SO4 or HCl, to give a compound of formula II or III and a dimer of formula IV or V. In the process, an aliphatic carboxylic acid, e.g. a 1W6C aliphatic saturated carboxylic acid, preferably acetic acid, and an anhydride thereof are used as at least one component of the reaction solvent. The compound of formulas IV and V are isomerized in the presence of an acidic catalyst to the compounds of formulas II and III, and the circulation thereof through the reaction system improves the yield of the product.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7111980A JPS56167655A (en) | 1980-05-28 | 1980-05-28 | Preparation of methylenedicarbanilate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7111980A JPS56167655A (en) | 1980-05-28 | 1980-05-28 | Preparation of methylenedicarbanilate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56167655A true JPS56167655A (en) | 1981-12-23 |
Family
ID=13451352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7111980A Pending JPS56167655A (en) | 1980-05-28 | 1980-05-28 | Preparation of methylenedicarbanilate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56167655A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6094547A (en) * | 1983-10-28 | 1985-05-27 | Nec Corp | Radio telephony system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5557550A (en) * | 1978-10-20 | 1980-04-28 | Atlantic Richfield Co | Manufacture of diphenylmethanedicarbamate and polymethylenepolyphenylcarbamate |
-
1980
- 1980-05-28 JP JP7111980A patent/JPS56167655A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5557550A (en) * | 1978-10-20 | 1980-04-28 | Atlantic Richfield Co | Manufacture of diphenylmethanedicarbamate and polymethylenepolyphenylcarbamate |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6094547A (en) * | 1983-10-28 | 1985-05-27 | Nec Corp | Radio telephony system |
JPH0446019B2 (en) * | 1983-10-28 | 1992-07-28 | Nippon Electric Co |
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