Abstract
Abstract The methods for derivatization of phenols, substituted aromatic aldehydes, ketones and amines to produce substances containing-N[dbnd]N-, and bonds have been considered. The latter are capable to form a four-spot square as a result of two-dimensional chromatography with preliminary UV-irradiation before each development. It is shown, that on the sorbent layer take place reversible Z-E, syn-anti and azomethine-methanolamine conversions, which permit to obtain the magic square on TLC plates and thus to identify organic compounds in complex mixtures.
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