GB970948A - Novel barbituric acids with aromatic substituents - Google Patents
Novel barbituric acids with aromatic substituentsInfo
- Publication number
- GB970948A GB970948A GB4610161A GB4610161A GB970948A GB 970948 A GB970948 A GB 970948A GB 4610161 A GB4610161 A GB 4610161A GB 4610161 A GB4610161 A GB 4610161A GB 970948 A GB970948 A GB 970948A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ethyl
- treating
- acid
- ethanol
- acetate
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The invention comprises compounds of general formula <FORM:0970948/C1/1> wherein X is phenyl, fluorine, chlorine, bromine or iodine in the ortho or para position, and R is an ethyl or allyl radical. The compounds are prepared by condensation of substituted malonic acid ethyl esters with urea. Ethyl substituted-phenyl-acetates prepared are ethyl 4-biphenylyl-acetate by treating the acid with thionyl chloride so forming the chloride and treating this with ethanol, ethyl p-fluorophenylacetate by treating the acid with sulphuric acid and ethanol, ethyl p-chlorophenyl-acetate by treating the nitrile with ethanol and hydrogen fluoride, ethyl p-bromophenyl-acetate by treating the acid with ethanol and hydrogen chloride, and ethyl p-iodophenyl-acetate by treating p-iodobenzyl-bromide with potassium cyanide to form the nitrile and thence obtaining the ester. Ethyl esters of substituted-phenyl-malonic acids are prepared by condensing the acetates with ethyl oxalate, sodium salts being initially formed of intermediate oxalacetic acid esters, and decarboxylating with heat. Reaction with compounds R-halogen then yields C,C-substituted malonic acid ethyl esters. Specification 825,832 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2220160 | 1960-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB970948A true GB970948A (en) | 1964-09-23 |
Family
ID=11192959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4610161A Expired GB970948A (en) | 1960-12-28 | 1961-12-22 | Novel barbituric acids with aromatic substituents |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB970948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337518A (en) * | 1998-05-20 | 1999-11-24 | Samsung Electronics Co Ltd | Malonate dissolution inhibitor |
-
1961
- 1961-12-22 GB GB4610161A patent/GB970948A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2337518A (en) * | 1998-05-20 | 1999-11-24 | Samsung Electronics Co Ltd | Malonate dissolution inhibitor |
| US6165680A (en) * | 1998-05-20 | 2000-12-26 | Samsung Electronics Co., Ltd. | Dissolution inhibitor of chemically amplified photoresist and chemically amplified photoresist composition containing the same |
| GB2337518B (en) * | 1998-05-20 | 2003-10-08 | Samsung Electronics Co Ltd | Dissolution inhibitor of chemically amplified photoresist and chemically amplified photoresist composition containing the same |
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