chloranil


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Related to chloranil: chloranilic acid, DDQ

chloranil

[klȯr′an·əl]
(organic chemistry)
C6Cl4O2 Yellow leaflets melting at 290°C; soluble in organic solvents; made from phenol by treatment with potassium chloride and hydrochloric acid; used as an agricultural fungicide and as an oxidizing agent in the manufacture of dyes.
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Summary: An efficient new method for the preparation of triphenodioxazines (TPDOs) using p- chloranil as oxidizing agent in conc.
Recently chloranil was employed as cyclising agent for the synthesis of dissymmetric TPDOs, however, the product was obtained indirectly through bisphenoxy or phenoxazine tricyclic intermediate [14, 15] instead of dianilide intermediate.
Different spectrophotometric procedures have been reported for determination of PEH including the formation of ion-pair complexes between the drug and alizarine, alizarine red S, alizarine yellow G or quinalizarine [14], ninhydrin in sulfuric acid [15], nitrobenzene derivates in acetonitrile medium [16], oxidative coupling with 4-aminoantipyrine in the presence of potassium ferricyanide or sodium periodate [17,18], diazotized p-nitroaniline or 2-aminobenzothiazol in alkaline medium [19,20], forming a charge transfer complex with chloranil or haematoxylin in alkaline medium [21,22]= 7and[23].