J. Loudfoot, Y. Chan
Jul 1, 1967
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Journal
Canadian Journal of Chemistry
Abstract
The study of 2,4-dinitrophenyl peptides has been extended to include the preparation and properties of some further dinitrophenyl dipeptides, namely, the glycyl-l-tryptophan, glycyl-l-proline, glycyl-l-phenylalanine, and glycyl-l-glutamic acid derivatives. Electrophoresis gave a good separation of products, and thin-layer chromatography proved to be a good means of purifying and separating the products. The molar absorbancy varies somewhat in the 350–360, 260–270, and 210–235 mμ, ranges in aqueous sodium bicarbonate solution, is more consistent in 95% ethanol at 344 mμ, and shows some variation in the 255–265 mμ region in 95% ethanol; the infrared absorption spectra have been obtained. The characterization of two dinitrophenyl amino acyl chlorides by conversion into the amides, anilides, and p-toluidides is also reported.