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US3743659A Expired / Lapsed US ⏱️ 0.0 years remaining

Substituted isochromans and processes therefor

Assignee: Riker Laboratories Inc
•
Filing: 1971-08-25
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Granted: 1973-07-03
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Expires: 1991-08-25
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Abstract

Abstract AMINO-SUBSTITUTED 1-PHENYL ISOCHROMANS OF THE FORMULA 1-(R-C6H4-),R1,R2,R3,Q-ISOCHROMAN WHEREIN R IS HYDROGEN, LOWER ALKYL, HALOGEN, TRIFLUOROMETHYL, AMINO, N-LOWER ALKYLAMINO OR N,N-DI-LOWER ALKYLAMINO; R1 IS HYDROGEN OR LOWER ALKYL, R2 AND R3 ARE EACH HYDROGEN, LOWER ALKYL, LOWER ALKOXY, HYDROXY, HALOGEN OR TRIFLUOROMETHYL AND Q IS A RADICAL ATTACHED TO EITHER THE 3 OR 4 POSITION, HAVING THE STRUCTURE -(CH2)M-N(-R4)-R5 WHEREIN R4 AND R5 ARE INDEPENDENTLY HYDROGEN, LOWER ALKYL OR HYDROXY-LOWER ALKYL OR, WHEN TAKEN TOGETHER WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED, FORM A 5OR 6-MEMBERED NITROGEN-CONTAINING RING HAVING FROM 3 TO 5 CARBON ATOMS IN THE RING, ONE OF WHICH MAY BE REPLACED BY AN OXYGEN ATOM, M IS ZERO TO 4 AND WHEN M IS 1 OR MORE, THE ALKYLENE CHAIN MAY CONTAIN A SUBSTITUENT METHYL GROUP; AND SALTS THEREOF. PROCESSES FOR THE PREPARATION OF SAID INTERMEDIATE COMPOUNDS AND FINAL PRODUCTS ARE DISCLOSED. THE FINAL PRODUCTS OF THE INVENTION HAVE UTILITY AS CNS-ACTIVE AGENTS, E.G. ANTICONVULSANTS, ANTIDEPRESSANTS AND ANORECTIC AGENTS.

Inventors

  • 👤 N Sugisaka
  • 👤 M Klohs
  • 👤 F Petracek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 07:34
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/76; C07D405/00; C07D405/02; C07D405/04

Claims Analysis

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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-07-02 1977-01-01 1977-07-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-02 1981-01-01 1981-07-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-02 1985-01-01 1985-07-03 $7700.00 Window Closed / Lapsed

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