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US3931314A Expired / Lapsed US ⏱️ 0.0 years remaining

Benzophenone derivatives and process for their production

Assignee: Cassella Farbwerke Mainkur AG
•
Filing: 1974-08-26
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Granted: 1976-01-06
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Expires: 1994-08-26
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Abstract

Abstract The present invention relates to pharmacologically valuable new benzophenone derivatives having a pronounced sedative action on the central nervous system and some of which also possess muscle-relaxing and aggression-inhibiting properties. These new derivatives have the structural formula ##EQU1## and their acid addition salts, in which R 1 and R 2 are substituents selected from the group consisting of hydrogen, saturated and unsaturated alkyl groups having 1-4 carbon atoms; R 3 is a substituent selected from the group consisting of --CN, --CONH 2 , --COOCH 3 , --COOC 2 H 5 , --COOH, and --COOMe, where Me is a metallic cation; n is an integer selected from 1 and 2; and m is an integer selected from 1,2, and 3, and wherein the rings A and B may be substituted, ring A being substituted preferably with a halogen such as chlorine or with nitro, trifluoromethyl, methyl, methoxy or methylmercapto, preferably in the 5 position, and ring B being preferably substituted in the 2' position with chlorine or fluorine. The radicals R 1 and R 2 preferably signify hydrogen or a methyl group, or a n-butyl group in the case of Ring B.

Inventors

  • 👤 Heinz Gunter Greve
  • 👤 Klaus Resag

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 05:49
CPC Classifications
C; C07; C07C; C07C255/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 113 words
Benzophenone derivative having the structural formula ##EQU8## and the acid addition salts thereof, wherein R 1 and R 2 are substituents selected from the group consisting of hydrogen, saturated and unsaturated alkyl groups having 1 - 4 carbon atoms; R 3 is --CONH 2 ; n is an integer selected from 1 and 2; and m is an integer selected from 1, 2 and 3, and wherein the ring A is substituted at the 5-position with a substituent selected from the group consisting of halogen, nitro, trifluoromethyl, methyl, methoxy and methylmercapto and the ring B is substituted at the 2' position with a substituent selected from the group consisting of fluorine and chlorine.
Claim 2
Dependent Claim 113 words
Benzophenone derivative having the structural formula ##EQU8## and the acid addition salts thereof, wherein R 1 and R 2 are substituents selected from the group consisting of hydrogen, saturated and unsaturated alkyl groups having 1 - 4 carbon atoms; R 3 is --CONH 2 ; n is an integer selected from 1 and 2; and m is an integer selected from 1, 2 and 3, and wherein the ring A is substituted at the 5-position with a substituent selected from the group consisting of halogen, nitro, trifluoromethyl, methyl, methoxy and methylmercapto and the ring B is substituted at the 2' position with a substituent selected from the group consisting of fluorine and chlorine.
Claim 3
Dependent Claim 37 words
Benzophenone derivative according to claim 1, wherein R 1 is a substituent selected from the group consisting of hydrogen and methyl and R 2 is a substituent selected from the group consisting of hydrogen, methyl and butyl.

References Cited (Backward Citations)

US3334100A Cited
US3429874A Cited
US3729470A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-01-05 1979-07-07 1980-01-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-01-05 1983-07-07 1984-01-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-01-05 1987-07-07 1988-01-06 $7700.00 Window Closed / Lapsed

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