Patent US3821228A successfully refreshed from Google Patents.
US3821228A
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2-aminoalkyl tetrahydroquinolines
Assignee: Pfizer Ltd
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Filing: 1971-05-03
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Granted: 1974-06-28
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Expires: 1991-05-03
Abstract
Abstract Novel 2-aminoalkyl-7-substituted-1,2,3,4-tetrahydroquinoline compounds, useful as effective anti-schistosomal agents, are disclosed and suitable modes of preparation are described. These compounds all possess either nitro, cyano or halogen substituted at the 7-position of the molecule, in addition to having a methyl, hydroxymethyl, alkoxymethyl or formyl group located at the adjacent 6-position.
Inventors
- 👤 Hugh Colin Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:57
CPC Classifications
C; C12; C12P; C12P17/00; C12P17/10; C12P17/12; C07; C07D; C07D215/00; C07D215/02; C07D215/04; C07D215/06; C07D215/12; C07D215/16; C07D215/18; C07D215/38; C07D215/48; C07D215/58; C07D215/60; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/913
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
21 words
A compound as claimed in claim 1 wherein R3 is hydrogen, R5 is chloro, R6 is hydrogen and R8 is hydrogen.
Claim 2
Dependent Claim
15 words
The compound as claimed in claim 2 wherein R1 is isopropyl and R2 is hydrogen.
Claim 3
Dependent Claim
21 words
A compound as claimed in claim 1 wherein R3 is hydrogen, R5 is nitro, R6 is hydrogen and R8 is hydrogen.
Claim 4
Dependent Claim
15 words
The compound as claimed in claim 4 wherein R1 is isopropyl and R2 is hydrogen.
Claim 5
Dependent Claim
14 words
The compound as claimed in claim 4 wherein R1 and R2 are each ethyl.
Claim 6
Dependent Claim
1 words
6-Hydroxymethyl-2-isopropylaminomethyl-7-nitro-1,2,3,4-tetrahydroquinoline.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |