O-Alkylbenzoic acids

Diphenic acids and o-alkylbenzoic acids These substances are readily available from (1). 

Alkylalkanoic acids, 388 Alkyl oj-alkenoates, 313 3-Alkyl-l-alkynes, 85 6-N-Alkylaminouracils, 185 Alkyl aryl ethers, 645 Alkyl aryl ketones, 24 N-Alkylarylsulfonamides, 578 o-Alkylbenzaldehydes, 443 Alkyl benzoates, 347 o-Alkylbenzoic acids, 368 2-Alkyl-l-f-butylaziridines, 118 Alkyl f-butylperoxyglyoxalates, 82 Alkyl chlorides, 22, 259 6-Alkyl-A -cyclohexenones, 236... 

AHC(18)337>. The 3-alkylbenzo[6 ]furans result from cyclodehydration of aryloxyacetones the most common dehydrating agents are sulfuric acid, phosphorus oxychloride and poly-phosphoric acid. The allyl ethers of phenols can be converted to 2-alkyl-2,3-dihydro-benzo[6]furan by heating with polyphosphoric acid, pyridine hydrochloride or magnesium chloride at 180 °C the intermediate o-allylphenol is not isolated. 

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