Abstract
AbstractPhenmedipham and desmedipham, when injected into a gas chromatograph with N, N, N‐trimethylanilinium hydroxide, reacted to give derivatives having good gas chromatographic properties. By this procedure, these two carbamate herbicides yielded N‐methylated 3‐methoxyphenylcarbamates. Maximum methylation was obtained when the molar ratio of methylating reagent to herbicide was approximately 16: 1. This technique for preparing derivatives provided rapid qualitative and quantitative chromatography of the substances examined, without side‐chain decomposition. The derivatives obtained were identified by means of ultraviolet, infrared and mass spectrometric procedures.
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