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Organic : 2-carboxyazobenzene
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From: MSN Nickname·Steve·  in response to Message 1Sent: 10/14/2005 7:01 AM
This would be o-phenylazobenzoic acid?  The ortho isomer of Ph-N=N-Ph-COOH if I understand correctly.  A possible strategy is hinted on an organic review page at http://www.wpbschoolhouse.btinternet.co.uk/page07/Aromatics.htm.  It mentions that the diazonium chloride can be formed from 2-aminobenzoic acid.  Coupling of this diazonium salt with aniline should give 2-(p-aminophenylazo)benzoic acid.  Then perhaps the aniline NH2 group can be removed by subsequent diazotization and treatment with H3PO2 without affecting the azo and carboxy groups.  Just a guess!  I'm not familar with the methods used to prepare the other isomers.

Steve


Replies to This Message The number of members that recommended this message.    
     re: 2-carboxyazobenzene   MSN Nickname·Steve·  10/14/2005 7:11 AM
     re: 2-carboxyazobenzene   MSN NicknameX1095  10/16/2005 3:22 AM