P-Phenylphenacyl esters

Phenyl-3-methyl-5-pyrazolone, 998 p-Phenylpl lenacy 1 bromide, 962 p-Phenylphenacyl esters, 363 Phenylpropiolic acid, 755, 776 Phenylpropionaldehyde, 906, 907 Phenyl propionate, 676... 

Problems with avoiding too volatile methyl esters in the GC of carboxylic acids led Umeh [149] to use p-bromophenacyl and p-phenylphenacyl esters (Scheme 5.17). 

From the reaction products, there was isolated acetic acid as the p-phenylphenacyl ester, and (leao)-methoxysuccinic acid as the diamide. When the same reaction was applied to diginose, acetic acid was isolated together with (dexmelting point as that obtained by the oxidation of cymarose but an equal rotation of opposite sign. 

PROPERTIES AND DERIVATIVES. Germidine, Cj4H6 OioN, is dimorphic and melts at 198-200° or 230-231° (dec.) (dil. ethanol) [a]o + 13 (chloroform), —11° (pyridine) thiocyanate, m.p. 242-244 (dec.) (dil. methanol). Alkaline hydrolysis of germidine gave rise to germine and a mixture of acetic and d-(—)-a-methylbutyric acid, which were obtained in the form of their p-phenylphenacyl esters (19). 

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