Patent EP0128318A2 successfully refreshed from Google Patents.
EP0128318A2
Expired / Lapsed
EP
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Substituted indonaphthols used in detecting ions
Assignee: Bayer Corp
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Filing: 1984-04-30
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Granted: —
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Expires: 2004-04-30
Abstract
Abstract A novel compound is disclosed having the structurein which R is lower alkyl and X is halogen or pseudohalogen. Also disclosed is a novel process for preparing the compound which comprises the steps of combining a compound having the structurein which X is a halogen or pseudohalogen, and a compound havina the structurein which R is lower alkyl and A is lower alkylidene to produce a first reaction mixture; adjusting the pH of the first reaction mixture to at least about 8 to produce a second reaction mixture; and recovering the compound or its salt from the second reaction mixture.
Inventors
- 👤 Steven C. Charlton
- 👤 Roger L. Fleming
- 👤 Arthur L. Y. Lau
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:37
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/84
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
A novel compound having the structure in which R is lower alkyl and X is halogen or pseudohalogen.
Claim 2
Dependent Claim
18 words
A novel compound having the structure in which R is lower alkyl and X is halogen or pseudohalogen.
Claim 3
Dependent Claim
14 words
2 . A compound according to claim 1, characterized in that R is methyl.
Claim 4
Dependent Claim
14 words
A compound according to claim 1 or 2, characterized in that X is Cl.
Claim 5
Dependent Claim
86 words
A process for preparing the compound of claim 1, the process comprising the steps of combining a compound having the structure in which X is a halogen or pseudohalogen, and a compound having the structure in which R is lower alkyl and A is lower alkylidene, to produce a first reaction mixture; adjusting the pH of the first reaction mixture to at least about 8 to produce a second reaction mixture; and recovering the compound of claim 1 or its salt from the second reaction mixture.
Claim 6
Dependent Claim
21 words
The process of claim 4 in which the steps of recovering comprises adjusting the pH to the range of about 2-4.
Claim 7
Dependent Claim
25 words
The process of claim 4 in which the step of combining comprises combining 2,5-dichloroquinone-4-chloroimide and N-(1'-(2'-methyl)naphthyl]aminoethanol and the compound of claim 1 is 2-methyl-4-(3',5'-dichlorophen-4'-one) indonaphth-l-ol.
References Cited (Backward Citations)
No citation records indexed.
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