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US3668197A Expired / Lapsed US ⏱️ 0.0 years remaining

Esters and amides of (diazomethyl) phosphonic acid

Assignee: Merck and Co Inc
•
Filing: 1969-07-22
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Granted: 1972-06-06
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Expires: 1989-07-22
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Abstract

Abstract A method for the preparation of (cis-1,2-epoxypropyl)-phosphoric acid diesters and diamides which comprises treating the corresponding diester or diamide of (diazomethyl)-phosphonic acid with acetaldehyde or, alternatively, treating a mixture of an appropriate diester or diamide of formylphosphonic acid with diazoethane. The (cis-1,2-epoxypropyl) acid diesters and diamides thus obtained have utility as intermediates inasmuch as they may be converted to the pharmacologically active (cis-1,2epoxypropyl)phosphonic acid and to the salts thereof which inhibit the growth of gram-positive and gram-negative pathogenic bacteria.

Inventors

  • 👤 Raymond A Firestone

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 17:34
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/655; C07F9/65502; C07F9/65505; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 21 words
A compound according to claim 1 of the formula: wherein R is lower alkoxy, polychloro-lower alkoxy, lower alkenyloxy, benzyloxy or phenethyloxy.
Claim 2
Dependent Claim 14 words
A compound according to claim 2 wherein R is methoxy, 2,2,2-trichloroethoxy, allyloxy or benzyloxy.

References Cited (Backward Citations)

US2774782A Cited
US2773893A Cited
US2710248A Cited
US2710862A Cited
US2965667A Cited
US3332936A Cited
US3251830A Cited
US3242166A Cited
US3355521A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-06-06 1975-12-06 1976-06-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-06-06 1979-12-06 1980-06-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-06-06 1983-12-06 1984-06-06 $7700.00 Window Closed / Lapsed

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