Biphenyl-2,2*-dicarboxylic acid

Swadesh, J. K., Stewart, Jr., C. W., and Uden, P. C., Comparison of liquid chromatographic methods for analysis of homologous n-alkyl esters of biphenyl-4,4,-dicarboxylic acid, Analyst, 118, 1123, 1993. 

More interestingly perhaps, the polyketone 7, derived from bis(4-phenoxyphenyl)-p-carborane (3) and biphenyl-4,4 -dicarboxylic acid (4), is essentially amorphous on isolation from trifluoromethanesulfonic acid, but crystallises on heating above its glass transition temperature (267 °C) before finally melting at around 390 °C. 

Other Condensation Reactions. BF3-MeOH and BF3 OEt2 with ethanol are widely used in the esterification of various kinds of aliphatic, aromatic, and carhoxyhc acids the reaction is mild, and no rearrangement of double bonds occurs. This esterification is used routinely for stable acids prior to GLC analysis. Heterocyclic carboxylic acids, unsaturated organic acids, biphenyl-4,4 -dicarboxylic acid, 4-aminobenzoic acid, and the very sensitive 1,4-dihydrobenzoic acid are esterified directly. 

Bilobalide, 150 Bilobetin, 152 Biochanin A, 415 Biotin, 140, 277 Biphenyl, chloro subs, 87 Biphenyl, nitro subs, 286 Biphenyl-4,4 -dicarboxylic acid alkyl esters, 118... 

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