JPS5795996A - Preparation of 1-substituted oxycarbonyl-2- benzimidazolylmethylphosphonic acid monoester - Google Patents
Preparation of 1-substituted oxycarbonyl-2- benzimidazolylmethylphosphonic acid monoesterInfo
- Publication number
- JPS5795996A JPS5795996A JP17211780A JP17211780A JPS5795996A JP S5795996 A JPS5795996 A JP S5795996A JP 17211780 A JP17211780 A JP 17211780A JP 17211780 A JP17211780 A JP 17211780A JP S5795996 A JPS5795996 A JP S5795996A
- Authority
- JP
- Japan
- Prior art keywords
- benzimidazolylmethylphosphonic
- acid monoester
- alkyl
- carbon dioxide
- formula
- 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
Abstract
PURPOSE: To obtain the titled compound useful as an alkoxycarbonylating agent advantageously, by reacting a 2-benzimidazolylmethylphosphonic acid monoester with carbon dioxide and an alcohol in the presence of a tertiary amine and phosphorus oxychloride.
CONSTITUTION: A 2-benzimidazolymethylphosphonic acid monoester (e.g., 2- benzimidazolylmethylphosphonic monoethyl, ester etc.) shown by the formula I(R1 and R2 are H or alkyl; R3 is alkyl) is reacted with carbon dioxide and an alcohol shown by the formula ROH (R is alkyl or aryl) in the presence of a tertiary amine (e.g., triethylamine, pyridine, etc.) and phorphorus oxychloride, preferably at room temperature, to give a compound shown by the formula II.
EFFECT: The titled compound is obtained from carbon dioxide directly in high yield without using a toxic raw material.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17211780A JPS5795996A (en) | 1980-12-08 | 1980-12-08 | Preparation of 1-substituted oxycarbonyl-2- benzimidazolylmethylphosphonic acid monoester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17211780A JPS5795996A (en) | 1980-12-08 | 1980-12-08 | Preparation of 1-substituted oxycarbonyl-2- benzimidazolylmethylphosphonic acid monoester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5795996A true JPS5795996A (en) | 1982-06-15 |
Family
ID=15935863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17211780A Pending JPS5795996A (en) | 1980-12-08 | 1980-12-08 | Preparation of 1-substituted oxycarbonyl-2- benzimidazolylmethylphosphonic acid monoester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5795996A (en) |
-
1980
- 1980-12-08 JP JP17211780A patent/JPS5795996A/en active Pending
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