Patent US2861992A successfully refreshed from Google Patents.
US2861992A
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Derivatives of quercetin and to prodesses for their preparation
Assignee: RECH S ET TECH APPLIQUEES
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Filing: 1956-08-03
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Granted: 1958-11-25
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Expires: 1976-08-03
Abstract
No abstract record available.
Inventors
- 👤 Lassauniere Pierre E Chabri De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:31
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62; A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/365; A61K31/375; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/28; C07D311/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A NEW DERIVATIVE OF QUERCETIN PRODUCED BY THE PROCESS WHICH COMPRISES REACTING A CHLORIDE SELECTED FROM THE CLASS CONSISTING OF B-DIETHYLAMINO ETHYL CHLORIDE AND B-MORPHOLINO ETHYL CHLORIDE WITH QUERCETIN IN A STIRRED AQUEOUS ALKALINE MEDIUM UNDER AN INERT ATMOSPHERE AT A TEMPERATURE OF 80-90*C., THE PROPORTION OF SAID CHLORIDE WITH RESPECT TO QUERCETIN BEING IN EXCESS OF THAT REQUIRED TO FORM A MONO-ETHER OF QUERECTIN BUT LESS THAN REQUIRED TO FORM A DI-ETHER OF QUERECTIN BUT MEDIUM CONTAINING ALKALI IN EXCESS OF THE PROPORTION REQUIRED TO FIX HYDROCHLORIC ACID AS DISENGAGED; COOLING THE REACTION MIXTURE AND NEUTRALIZING THE SAME, TO FORM A PRECIPITATE; AND SEPARATING THE MONO-ETHER FROM UNREACTED QUERCETIN IN SAID SAID PRECIPITATE.
Claim 2
Dependent Claim
114 words
A NEW DERIVATIVE OF QUERCETIN PRODUCED BY THE PROCESS WHICH COMPRISES REACTING A CHLORIDE SELECTED FROM THE CLASS CONSISTING OF B-DIETHYLAMINO ETHYL CHLORIDE AND B-MORPHOLINO ETHYL CHLORIDE WITH QUERCETIN IN A STIRRED AQUEOUS ALKALINE MEDIUM UNDER AN INERT ATMOSPHERE AT A TEMPERATURE OF 80-90*C., THE PROPORTION OF SAID CHLORIDE WITH RESPECT TO QUERCETIN BEING IN EXCESS OF THAT REQUIRED TO FORM A MONO-ETHER OF QUERECTIN BUT LESS THAN REQUIRED TO FORM A DI-ETHER OF QUERECTIN BUT MEDIUM CONTAINING ALKALI IN EXCESS OF THE PROPORTION REQUIRED TO FIX HYDROCHLORIC ACID AS DISENGAGED; COOLING THE REACTION MIXTURE AND NEUTRALIZING THE SAME, TO FORM A PRECIPITATE; AND SEPARATING THE MONO-ETHER FROM UNREACTED QUERCETIN IN SAID SAID PRECIPITATE.
Claim 3
Dependent Claim
111 words
A NEW DERIVATIVE OF QUERCETIN PRODUCED BY THE PROCESS WHICH COMPRISES REACTING B-MORPHOLINOETHYL CHLORIDE WITH QUERCETIN IN A STIRRED AQUEOUS ALKALINE MEDIUM UNDER AN INERT ATMOSPHERE AT A TEMPERATURE OF 80*-90* C., THE PROPORTION OF SAID CHLORIDE WITH REPSECT TO QUERCETIN BEING IN EXCESS OF THAT REQUIRED TO FORM A MONOETHER OF QUERCETIN BUT LESS THAN REQUIRED TO FORM A DIETHER OF THE SAME, SAID MEDIUM CONTAINING ALKALI IN EXCESS OF THE PROPORTION REQUIRED TO FIX HYDROCHLORIC ACID AS DISENGAGED; COOLING THE REACTION MIXTURE AND NEUTRALIZING THE SAME, TO FORM A PRECIPITATE; SEPARATING THE MONO-ETHER FROM UNREACTED QUERCETIN IN SAID PRECIPITATE, AND QUATERNISING THE MONO-ETHER THUS SEPARATED BY TREATMENT WITH METHYLIODIDE.
Claim 4
Dependent Claim
111 words
A NEW DERIVATIVE OF QUERCETIN PRODUCED BY THE PROCESS WHICH COMPRISES REACTING B-MORPHOLINOETHYL CHLORIDE WITH QUERCETIN IN A STIRRED AQUEOUS ALKALINE MEDIUM UNDER AN INERT ATMOSPHERE AT A TEMPERATURE OF 80*-90* C., THE PROPORTION OF SAID CHLORIDE WITH REPSECT TO QUERCETIN BEING IN EXCESS OF THAT REQUIRED TO FORM A MONOETHER OF QUERCETIN BUT LESS THAN REQUIRED TO FORM A DIETHER OF THE SAME, SAID MEDIUM CONTAINING ALKALI IN EXCESS OF THE PROPORTION REQUIRED TO FIX HYDROCHLORIC ACID AS DISENGAGED; COOLING THE REACTION MIXTURE AND NEUTRALIZING THE SAME, TO FORM A PRECIPITATE; SEPARATING THE MONO-ETHER FROM UNREACTED QUERCETIN IN SAID PRECIPITATE, AND QUATERNISING THE MONO-ETHER THUS SEPARATED BY TREATMENT WITH METHYLIODIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |