ES266734A1 - Process for the preparation of 2-chloroazacyclo 2.3-alkene-1-carbochlorides from Ï-lactams - Google Patents
Process for the preparation of 2-chloroazacyclo 2.3-alkene-1-carbochlorides from Ï-lactamsInfo
- Publication number
- ES266734A1 ES266734A1 ES0266734A ES266734A ES266734A1 ES 266734 A1 ES266734 A1 ES 266734A1 ES 0266734 A ES0266734 A ES 0266734A ES 266734 A ES266734 A ES 266734A ES 266734 A1 ES266734 A1 ES 266734A1
- Authority
- ES
- Spain
- Prior art keywords
- phosgene
- reaction
- lactam
- chloroazacyclo
- lactams
- 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)
Abstract
In a process for the preparation of a 2-chloroazacyclo-2, 3-alkene-N-carbochloride by reacting in the liquid phase the corresponding o -lactams with phosgene, the lactam being used (1) as such, and while ensuring that at all or substantially all times during the reaction there is an excess of the phosgene over the stoichiometric amount (i.e. a molar ratio of phosgene to lactam of more than 2:1), or (2) as the hydrochloric acid salt, the temperature is maintained at between 115 DEG to 150 DEG C. during at least the latter part of the reaction. The reaction temperature is preferably initially 25 DEG to 90 DEG C. and subsequently 115 DEG to 150 DEG C. Condition (1) may be maintained by feeding the lactam into phosgene or by feeding the phosgene and lactam simultaneously into a reaction vessel. Reaction pressures are preferably 10 to 50 atmospheres. Specification 901,169 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL250841 | 1960-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES266734A1 true ES266734A1 (en) | 1961-10-01 |
Family
ID=19752296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0266734A Expired ES266734A1 (en) | 1960-04-23 | 1961-04-19 | Process for the preparation of 2-chloroazacyclo 2.3-alkene-1-carbochlorides from Ï-lactams |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE602883A (en) |
| CS (1) | CS154554B2 (en) |
| ES (1) | ES266734A1 (en) |
| GB (1) | GB940121A (en) |
| LU (1) | LU40046A1 (en) |
-
1961
- 1961-04-19 ES ES0266734A patent/ES266734A1/en not_active Expired
- 1961-04-21 BE BE602883A patent/BE602883A/en unknown
- 1961-04-21 LU LU40046D patent/LU40046A1/xx unknown
- 1961-04-21 GB GB1462261A patent/GB940121A/en not_active Expired
- 1961-04-22 CS CS249361A patent/CS154554B2/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| LU40046A1 (en) | 1961-06-21 |
| BE602883A (en) | 1961-10-23 |
| GB940121A (en) | 1963-10-23 |
| CS154554B2 (en) | 1974-04-30 |
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