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US3886144A Expired / Lapsed US ⏱️ 0.0 years remaining

Oxazolo(and oxazino)(3,2-d)pyrazolo-(3,4-f)(1,4)diazepin-5(6H)-one compounds

Assignee: Parke Davis and Co LLC
•
Filing: 1974-01-21
•
Granted: 1975-05-27
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Expires: 1994-01-21
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Abstract

Abstract Oxazolo(and oxazino)(3,2-d)pyrazolo(3,4-f)(1,4)-diazepin-5(6H)ones and methods for the preparation are disclosed. The compounds can be prepared by one or more of the following procedures: Reaching the appropriately substituted pyrazolodiazepinone with an alkylene oxide; cyclizing the appropriately substituted 5aroyl-4-(2-(hydroxyalkylamino)acetamido)pyrazole via heat or an acid catalyst; reacting the appropriately substituted Schiff base of a pyrazole and/or oxazolidine of a pyrazole with a haloacylhalide in the presence of a base; reacting the appropriately substituted oxazolopyrazolodiazepinone or oxazinopyrazolodiazepinone with an alkylating agent in the presence of a base. The compounds are pharmacological agents, especially anticonvulsants.

Inventors

  • 👤 Ivan C Nordin
  • 👤 Horace A Dewald

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 12:38
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; C07D231/16; C07D231/40; C07D487/00; C07D487/02; C07D487/04

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim 5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim 57 words
A compound of claim 1 wherein R1 is a straight or branched chain hydrocarbon group of from one to three carbon atoms, R2 and R3 are hydrogen, R4 is selected from the group consisting of hydrogen and methyl, X and Y are selected from the group consisting of hydrogen and fluorine and A is a single bond.
Claim 4
Dependent Claim 10 words
A compound according to claim 2 which is 1-ethyl-4,8,9,10a-tetrahydro-3,9-dimethyl-10a-phenyl-1H-oxazolo(3,2 -d)pyrazolo(3,4-f)(1,4)diazepin-5(6H)-one.
Claim 5
Dependent Claim 10 words
A compound according to claim 2 which is 1-ethyl-4,8,9,10a-tetrahydro-3-methyl-10a-phenyl-1H-oxazolo(3,2 -d)pyrazolo(3,4-f)(1,4)diazepin-5(6H)-one.
Claim 6
Dependent Claim 9 words
A compound according to claim 2 which is 10a-(2,6-difluorophenyl)-4,8,9,10a-tetrahydro-1,3,9-trimethyl-1H-oxazolo(3,2-d)pyrazolo(3,4-f)(1,4)diazepin-5-(6H)-one.
Claim 7
Dependent Claim 10 words
A compound according to claim 2 which is 1-ethyl-10a-(o-fluorophenyl)-4,8,9,10-a-tetrahydro-3,9-dimethyl-1H -oxazolo(3,2-d)pyrazolo(3,4-f)(1,4)diazepin-5(6H)-one.

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) 1978-05-26 1978-11-25 1979-05-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-05-26 1982-11-25 1983-05-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-05-26 1986-11-25 1987-05-27 $7700.00 Window Closed / Lapsed

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