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10.1002/jps.2600510424.abs N‐β‐Phenethyl amides of α‐benzyloximino acids were prepared as intermediates for an attempted cyclization to the corresponding 3, 4‐dihydroisoquinoline derivatives.
10.1002/jps.2600510415.abs The pH‐rate profile of the hydrolytic cleavage of thiamine determined from kinetics measurements has been found to be unusually complex. Under essentially bufferfree conditions, the overall behavior suggests existence of at least four separate reactions: (a) acid...
10.1002/jps.2600510406.abs The photostabilizing effect of the ultraviolet absorber 2,4‐dihydroxybenzophenone for tablets colored with three certified dyes was evaluated. Two sources of light were employed; one approximating the spectral energy distribution of sunlight and the other simulating...
10.1002/jps.2600510422.abs The kinetics of acid and enzymic hydrolysis of the parenterally pharmacologically active N‐butylformamide have been studied by titrimetric and color assay procedures. It is expected that the half‐life of the amide under the conditions of the human stomach would...
10.1002/jps.2600510405.abs Barbiturates and certain related hypnotics have been separated and identified by direct gas chromatography on a number of different stationary phases. Depending on the type and concentration of stationary phase, column temperatures ranging from about 140 to 200° were...
10.1002/jps.2600510408.abs Stability constants are reported for the chelation of ferric and aluminum ions by a series of salicylic acid derivatives having amino, alkyl, chloro, and nitro groups in the ring. The sequence of complex stabilities found is in agreement with current organic theory and...
10.1002/jps.2600510420.abs A procedure is described in which urine pigments, salicylate, and other chromogenic materials which preclude spectrophotometric evaluation of barbiturate by virtue of their strong absorption in the ultraviolet region are removed from a chloroform solution by selective...
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