US2139583A - Barbituric acids - Google Patents
Barbituric acids Download PDFInfo
- Publication number
- US2139583A US2139583A US47720A US4772035A US2139583A US 2139583 A US2139583 A US 2139583A US 47720 A US47720 A US 47720A US 4772035 A US4772035 A US 4772035A US 2139583 A US2139583 A US 2139583A
- Authority
- US
- United States
- Prior art keywords
- barbituric acid
- radicles
- barbituric acids
- barbituric
- unsaturated
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
- C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
- C07D405/06—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
Definitions
- the invention relates to a new barbituric acid and forms a continuation in part to my copending application Serial No. 708,694, now Patent No. 2,035,317. It has been found that the 5,5-
- 5 allyl-furomethyl barbituric acid is an excellent hypnotic which can be manufactured by introducing the two radicles into barbituric acid or by introducing into the barbituric acid carrying already one of said radicles the second radicle.
- the same purpose can also be obtained by starting from malonic acid or its derivatives, for instance cyanoacetic ester and introducing into the same the two radicles.
- malonic acid or its derivatives for instance cyanoacetic ester
- the introduction of furomethyl radicles into barbituric acid or .intotheir monosubstitution products is preferably obtained by treating the same with furomethyl halogenide.
- the introduction of the new radicles represents a reaction easily to be performed, already at room temperature. This behaviour could not be foreseen, since according to the present knowledge it must be expected that only simple aliphatic, unsaturated halogenides would react with salts of barbituric acid and their monosubstitution products in an aqueous solution under formation of C,C-disubstituted barbituric acids.
- the furan cycle possesses, it is true, unsaturated character. However, it resembles in its chemical behaviour much more the benzol cycle than an aliphatic unsaturated compound. For instance it is difiicult to combine hydrogen with its double valencies. For this reason the furamethyl halogenide cannot be compared with a simple aliphatic, unsaturated halogenide. 5
Description
Patented Dec. 6, 1938 UNITED STATES PATENT OFFICE 1 richsthal, Germany,
assignor to the firm Chemische Fabriken Dr. Joachim Wiernik & Co. Aktiengesellschaft, Berlin-Waidmannslust,
Germany No Drawing. Application October 31, 1935, Serial No. 47,720. In Germany February 1, 1933 1 Claim.
The invention relates to a new barbituric acid and forms a continuation in part to my copending application Serial No. 708,694, now Patent No. 2,035,317. It has been found that the 5,5-
5 allyl-furomethyl barbituric acid is an excellent hypnotic which can be manufactured by introducing the two radicles into barbituric acid or by introducing into the barbituric acid carrying already one of said radicles the second radicle.
The same purpose can also be obtained by starting from malonic acid or its derivatives, for instance cyanoacetic ester and introducing into the same the two radicles. Instead thereof it is also possible to introduce one of said radicles into the derivatives of the malonic acids already substituted by the other one and to convert the disubstituted compounds thus obtained to the barbituric acid derivatives by the methods known in the arts e. g. by condensation with urea.
The introduction of furomethyl radicles into barbituric acid or .intotheir monosubstitution products is preferably obtained by treating the same with furomethyl halogenide. The introduction of the new radicles represents a reaction easily to be performed, already at room temperature. This behaviour could not be foreseen, since according to the present knowledge it must be expected that only simple aliphatic, unsaturated halogenides would react with salts of barbituric acid and their monosubstitution products in an aqueous solution under formation of C,C-disubstituted barbituric acids. The furan cycle possesses, it is true, unsaturated character. However, it resembles in its chemical behaviour much more the benzol cycle than an aliphatic unsaturated compound. For instance it is difiicult to combine hydrogen with its double valencies. For this reason the furamethyl halogenide cannot be compared with a simple aliphatic, unsaturated halogenide. 5
In order to illustrate my new process more fully the following example is given, the parts being in weight:
EXAMPLE 5,5-allylfuromethyl barbituric acid 168 grins. 5-allyl barbituric acid are dissolved in 1 1. of normal solution of caustic potash and after addition of 5 grms. copper sulphate stirred with 116 grms. furfuryl chloride for several hours 15 under ice cooling. The new compound which is formed in a satisfying yield is taken ofi. After crystallizationfrom hot water it melts at 149- 151 0., the configuration presumably being as What I claim and desire to secure by Letters Patent of the United States is:
The herein described 5,5-allylfuromethyl barbituric acid melting at 149-151 C. and being a valuable hypnotic. 35
. GUSTAV HEILNER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2035317X | 1933-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2139583A true US2139583A (en) | 1938-12-06 |
Family
ID=7981956
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US708694A Expired - Lifetime US2035317A (en) | 1933-02-01 | 1934-01-27 | 5-isopropyl-5-furomethyl barbituric acid |
US47720A Expired - Lifetime US2139583A (en) | 1933-02-01 | 1935-10-31 | Barbituric acids |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US708694A Expired - Lifetime US2035317A (en) | 1933-02-01 | 1934-01-27 | 5-isopropyl-5-furomethyl barbituric acid |
Country Status (1)
Country | Link |
---|---|
US (2) | US2035317A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2448722A (en) * | 1946-04-04 | 1948-09-07 | Nat Drug Co | 5-benzimidazol derivatives of barbituric acid |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2721201A (en) * | 1955-10-18 | S-monofluoroalkyl barbituric acids | ||
US2786057A (en) * | 1953-06-05 | 1957-03-19 | American Home Prod | Process of producing 5, 5-di-substituted barbituric acids and product produced thereby |
US2820035A (en) * | 1953-10-07 | 1958-01-14 | Boehringer Sohn Ingelheim | Barbituric acid derivatives |
-
1934
- 1934-01-27 US US708694A patent/US2035317A/en not_active Expired - Lifetime
-
1935
- 1935-10-31 US US47720A patent/US2139583A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2448722A (en) * | 1946-04-04 | 1948-09-07 | Nat Drug Co | 5-benzimidazol derivatives of barbituric acid |
Also Published As
Publication number | Publication date |
---|---|
US2035317A (en) | 1936-03-24 |
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