Patent US2626949A successfully refreshed from Google Patents.
US2626949A
Expired / Lapsed
US
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Reaction of alpha-thiocyano car
Assignee: —
•
Filing: —
•
Granted: 1953-01-27
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Expires: 1970-01-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:34
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/40; C07D277/56; C07D417/00; C07D417/02; C07D417/12; C07D513/00; C07D513/02; C07D513/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD WHICH COMPRISES PREPARING A SUBSTANTIALLY ANHYDROUS REACTION MIXTURE CONTAINING, AS REACTANTS, AN ENOLIZABLE ALPHATHIOCYANO CARBONYL COMPOUND AND A PRIMARY AMINO COMPOUND SELECTED FROM THE CLASS CONSISTING OF PRIMARY AMINES AND THE ACID SALTS THEREOF, HEATING THE SAID MIXTURE THEREBY TO EFFECT A CHEMICAL REACTION INVOLVING THE SPLITTING OUT OF WATER FROM THE HYDROXYL GROUP OF THE ENOL FORM OF THE CARBONYL COMPOUND AND ONE OF THE HYDROGEN ATOMS OF THE AMINO GROUP OF THE AMINO COMPOUND WITH FORMATION OF AN INTERMEDIATE COMPOUND IN WHICH THE NITROGEN ATOM OF SAID AMINO GROUP IS ATTACHED TO THE CARBON ATOM ORIGINALLY PRESENT IN THE CARBONYL GROUP OF THE CARBONYL COMPOUND, AND REMOVING THE WATER OF REACTION WHILE CONTINUING TO HEAT THE REACTION MIXTURE WHEREUPON THE SAID INTERMEDIATE UNDERGOES RING CLOSURE BY FORMATION OF A BOND BETWEEN THE SAID NITROGEN ATOM AND THE CARBON ATOM OF THE THIOCYANO GROUP, WITH MIGRATION OF THE REMAINING HYDROGEN OF THE AMINO GROUP TO THE THIOCYANO NITROGEN ATOM, TO PRODUCE A 4-THIAZOLINE RING TO WHICH AN IMINO RADICAL IS ATTACHED IN THE 2-POSITION.
Claim 2
Independent Claim
177 words
THE METHOD WHICH COMPRISES PREPARING A SUBSTANTIALLY ANHYDROUS REACTION MIXTURE CONTAINING, AS REACTANTS, AN ENOLIZABLE ALPHATHIOCYANO CARBONYL COMPOUND AND A PRIMARY AMINO COMPOUND SELECTED FROM THE CLASS CONSISTING OF PRIMARY AMINES AND THE ACID SALTS THEREOF, HEATING THE SAID MIXTURE THEREBY TO EFFECT A CHEMICAL REACTION INVOLVING THE SPLITTING OUT OF WATER FROM THE HYDROXYL GROUP OF THE ENOL FORM OF THE CARBONYL COMPOUND AND ONE OF THE HYDROGEN ATOMS OF THE AMINO GROUP OF THE AMINO COMPOUND WITH FORMATION OF AN INTERMEDIATE COMPOUND IN WHICH THE NITROGEN ATOM OF SAID AMINO GROUP IS ATTACHED TO THE CARBON ATOM ORIGINALLY PRESENT IN THE CARBONYL GROUP OF THE CARBONYL COMPOUND, AND REMOVING THE WATER OF REACTION WHILE CONTINUING TO HEAT THE REACTION MIXTURE WHEREUPON THE SAID INTERMEDIATE UNDERGOES RING CLOSURE BY FORMATION OF A BOND BETWEEN THE SAID NITROGEN ATOM AND THE CARBON ATOM OF THE THIOCYANO GROUP, WITH MIGRATION OF THE REMAINING HYDROGEN OF THE AMINO GROUP TO THE THIOCYANO NITROGEN ATOM, TO PRODUCE A 4-THIAZOLINE RING TO WHICH AN IMINO RADICAL IS ATTACHED IN THE 2-POSITION.
References Cited (Backward Citations)
CH238594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |