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US4552697A Expired / Lapsed US ⏱️ 0.0 years remaining

Compound useful in detecting ions and method of preparing it

Assignee: Bayer Corp
•
Filing: 1983-05-12
•
Granted: 1985-11-12
•
Expires: 2003-05-12
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Abstract

Abstract A novel compound is disclosed having the structure <IMAGE> (I) in which R is H or lower alkyl, R* is intermediate alkyl, and X is halogen or pseudohalogen. Also disclosed is a method for preparing the compound, the method including the steps of reacting (intermediate alkyl)benzene (I) with succinic anhydride to form (intermediate alkyl)-benzoylpropionic acid (II), successively reducing and dehydrating (II) to form 7-(intermediate alkyl)-1-tetralone (III), alkylating (III) to form 2-hydroxy(lower alkylidene)-7-(intermediate alkyl)-1-tetralone (IV), acrylating (IV) to form 2-acyloxy(lower alkylidene)-7-(intermediate alkyl)-1-tetralone (V), reacting (V) in the presence of an cycloalkene to form 7(intermediate alkyl)-2-(lower alkyl)-1-naphthol (VI), reacting (VI) with a 2,6-dihaloquinone-4-haloimide to form the compound (I), and isolating it.

Inventors

  • 👤 Kin F. Yip
  • 👤 Steven C. Charlton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 10:06
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/84; C; C07; C07C; C07C49/00; C07C49/587; C07C49/657; C07C49/665; C07C49/67; C07C49/703; C07C49/747; C07C51/00; C07C51/347; C07C57/00; C07C57/30; C07C59/00; C07C59/40; C07C59/76; C07C59/84

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 24 words
A compound having the structure ##STR6## in which R is H or lower alkyl, R* is intermediate alkyl, and X is halogen or pseudohalogen.
Claim 2
Dependent Claim 24 words
A compound having the structure ##STR6## in which R is H or lower alkyl, R* is intermediate alkyl, and X is halogen or pseudohalogen.
Claim 3
Dependent Claim 10 words
The compound of claim 1 in which R* is n-decyl.
Claim 4
Dependent Claim 10 words
The compound of claim 2 in which R is methyl.
Claim 5
Dependent Claim 10 words
The compound of claim 3 in which X is chlorine.
Claim 6
Dependent Claim 88 words
A method for preparing the compound of claim 1, the method including the steps of reacting (intermediate alkyl)benzene (I) with succinic anhydride to form (intermediate alkyl)benzoylpropionic acid (II), successively reducing and dehydrating (II) to form 7-(intermediate alkyl)-1-tetralone (III), alkylating (III) to form 2-hydroxy(lower alkylidene)-7-(intermediate alkyl)-1-tetralone (IV), acylating (IV) to form 2-acyloxy(lower alkylidene)-7-(intermediate alkyl)-1-tetralone (V), reacting (V) in the presence of an cycloalkene to form 7-(intermediate alkyl)-2-(lower alkyl)-1-naphthol (VI), reacting (VI) with a 2,6-dihaloquinone-4-haloimide (VII) to form the compound of claim 1, and isolating the compound of claim 1.
Claim 7
Dependent Claim 10 words
The method of claim 5 in which (I) is n-decylbenzene.
Claim 8
Dependent Claim 18 words
The method of claim 6 in which the alkylating step is performed so as to produce 2-hydroxylmethylidene-7-(intermediate alkyl)-1-tetralone.
Claim 9
Dependent Claim 10 words
The method of claim 7 in which VIII is 2,6-dichloroquinone-4-chloroimide.

References Cited (Backward Citations)

CA639191A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-11-11 1989-05-13 1989-11-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-11-11 1993-05-13 1993-11-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-11-11 1997-05-13 1997-11-12 $7700.00 Window Closed / Lapsed

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