GB843993A - Improvements in or relating to the preparation of 3:5-diketo-pyrazolidine derivatives - Google Patents
Improvements in or relating to the preparation of 3:5-diketo-pyrazolidine derivativesInfo
- Publication number
- GB843993A GB843993A GB16175/58A GB1617558A GB843993A GB 843993 A GB843993 A GB 843993A GB 16175/58 A GB16175/58 A GB 16175/58A GB 1617558 A GB1617558 A GB 1617558A GB 843993 A GB843993 A GB 843993A
- Authority
- GB
- United Kingdom
- Prior art keywords
- general formula
- derivative
- alkyl
- condensing
- aryl
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
Abstract
3:5 - Dioxopyrazolidine derivatives of the general formula: <FORM:0843993/IV(b)/1> (Wherein R11 represents a C1-6 alkyl radical, R12 represents hydrogen or an alkyl, aryl or acyl radical, and R13 and R14 represent alkyl, aryl or aralkyl radicals, with the proviso that R11, R12, R13 and R14 need not be dissimilar) are produced by condensing a 3 : 5 - dioxopyrazolidine derivative of the general formula: <FORM:0843993/IV(b)/2> with a 4 - halopiperidine derivative of the general formula: <FORM:0843993/IV(b)/3> (wherein X represents a halogen atom). Where R12 in the starting material II is an acyl radical, this may be split off during or after the condensation to give an end product in which R12 is hydrogen. The products form salts with organic or inorganic acids. 1 - Unsubstituted 3:5 - dioxopyrazolidines of genreal formula II above are prepared by condensing a disubstituted malonic acid derivative with hydrazine or a monoalkyl monoaryl or monoacyl hydrazine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH843993X | 1957-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB843993A true GB843993A (en) | 1960-08-10 |
Family
ID=4541616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16175/58A Expired GB843993A (en) | 1957-05-29 | 1958-05-20 | Improvements in or relating to the preparation of 3:5-diketo-pyrazolidine derivatives |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE567877A (en) |
| CH (1) | CH355151A (en) |
| GB (1) | GB843993A (en) |
| NL (1) | NL100004C (en) |
-
0
- BE BE567877D patent/BE567877A/xx unknown
- NL NL100004D patent/NL100004C/xx active
-
1957
- 1957-05-29 CH CH355151D patent/CH355151A/en unknown
-
1958
- 1958-05-20 GB GB16175/58A patent/GB843993A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL100004C (en) | |
| CH355151A (en) | 1961-06-30 |
| BE567877A (en) |
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