JPS5441830A - Production of p-hydroxybenzaldehyde - Google Patents
Production of p-hydroxybenzaldehydeInfo
- Publication number
- JPS5441830A JPS5441830A JP10808477A JP10808477A JPS5441830A JP S5441830 A JPS5441830 A JP S5441830A JP 10808477 A JP10808477 A JP 10808477A JP 10808477 A JP10808477 A JP 10808477A JP S5441830 A JPS5441830 A JP S5441830A
- Authority
- JP
- Japan
- Prior art keywords
- sulfuric acid
- aqueous sulfuric
- aminobenzaldehyde
- hydrolyzed
- hydroxybenzaldehyde
- 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: p-Aminobenzaldehyde is reacted with aqueous sulfuric acid rapidly under heating and after cooling, converted to the diazonium salt and hydrolyzed to produce titled compound in high yield without formation of tar.
CONSTITUTION: p-Aminobenzaldehyde is heated with an aqueous sulfuric acid of 20W50wt% concentration at 60W100°C for 10W30min and immediately cooled with cold water or ice water. The salt is diazotized and hydrolyzed in water or an aqueous sulfuric acid to produce said p-hydroxybenzaldehyde. During diazotization, the addition of urea is effective in an amount required for decomposing the excess sodium nitrate.
USE: Intermediate of medicines, agricultural chemicals, perfumes.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10808477A JPS5441830A (en) | 1977-09-07 | 1977-09-07 | Production of p-hydroxybenzaldehyde |
GB7834932A GB2008091B (en) | 1977-09-07 | 1978-08-30 | Process for producing p-hydroxybenzaldehyde |
US05/938,125 US4195041A (en) | 1977-09-07 | 1978-08-30 | Process for producing p-hydroxybenzaldehyde |
DE19782839053 DE2839053A1 (en) | 1977-09-07 | 1978-09-07 | PROCESS FOR PRODUCING P-HYDROXYBENZALDEHYDE |
US06/055,414 US4273941A (en) | 1977-09-07 | 1979-07-06 | Process for producing p-hydroxybenzaldehyde |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10808477A JPS5441830A (en) | 1977-09-07 | 1977-09-07 | Production of p-hydroxybenzaldehyde |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5441830A true JPS5441830A (en) | 1979-04-03 |
Family
ID=14475457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10808477A Pending JPS5441830A (en) | 1977-09-07 | 1977-09-07 | Production of p-hydroxybenzaldehyde |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5441830A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61158096U (en) * | 1985-03-23 | 1986-09-30 | ||
JPS62206793A (en) * | 1986-03-05 | 1987-09-11 | 松下電工株式会社 | Discharge lamp burner |
US7087751B2 (en) | 2001-01-18 | 2006-08-08 | Schering Corporation | Synthesis of temozolomide and analogs |
-
1977
- 1977-09-07 JP JP10808477A patent/JPS5441830A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61158096U (en) * | 1985-03-23 | 1986-09-30 | ||
JPS62206793A (en) * | 1986-03-05 | 1987-09-11 | 松下電工株式会社 | Discharge lamp burner |
US7087751B2 (en) | 2001-01-18 | 2006-08-08 | Schering Corporation | Synthesis of temozolomide and analogs |
US7446209B2 (en) | 2001-01-18 | 2008-11-04 | Schering Corporation | Synthesis of temozolomide and analogs |
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