US3673211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of {60 ,{62 -dihalo-{65 -hydroxycrotonic lactams
Assignee: BASF SE
•
Filing: 1969-03-18
•
Granted: 1972-06-27
•
Expires: 1989-03-18
Abstract
Abstract Manufacture of Alpha , Beta -dihalo- gamma -hydroxycrotonic lactams by reacting mucohalogenic acid halides with primary amines, as well as the new Alpha , Beta -dihalo- gamma hydroxycrotonic lactams themselves. The new products are valuable intermediates for the production of insecticides and fungicides.
Inventors
- 👤 Ekkehard Winterfeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
7 words
Alpha , Beta -dichloro- gamma -hydroxy-N-phenyl-crotonic lactam.
Claim 2
Dependent Claim
93 words
A process for the manufacture of a compound of the formula where R denotes hydrogen, an alkyl or cycloalkyl of up to 12 carbon atoms, benzyl, phenyl or phenyl substituted by methoxy or nitro, and the individual radicals X may be identical or different and each denotes chlorine or bromine, wherein mucohalogenic acid halides having the formula where X has the meaning given above, are reacted with ammonia or primary amines having the formula R - NH2III, where R has the meaning given above, at a temperature of from -20 to +20* C.
Claim 3
Dependent Claim
24 words
A process as claimed in claim 3, wherein the starting amine III is reacted in an excess of up to 15 percent by weight.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 3, wherein the reaction is carried out at a temperature of from 0 to 5* C.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 3, wherein the reaction is carried out in the presence of an inert organic solvent.
References Cited (Backward Citations)
US3063863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |