N-halogen compounds of cyanamide derivatives. VII. The preparation and amidination of 5-ethoxy-.DELTA.4-1,2,4-thiadiazolines.

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概要

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• 2-Methoxycarbonimidoyl and 2-amidino-3-imino-5-ethoxy-<I>Δ</I><SUP>4</SUP>-1,2,4-thiadiazolines (I and II) were prepared by the reaction of potassium ethoxythiocarbonylcyanamide (III) with <I>N</I>-chloro compounds of <I>O</I>-methylisourea and guanidine. <I>Δ</I><SUP>4</SUP>-1,2,4-Thiadiazoline, I reacted with aliphatic amine to give 2-amidino-<I>Δ</I><SUP>4</SUP>,2,4-thiadiazolines and 1,3,5-triazines in the presence of both the free amines and amine hydrochlorides. The ring opening of <I>Δ</I><SUP>4</SUP>-1,2,4-thiadiazoline, which finally results in the formation of 1,3,5-triazine, was found to be catalyzed mainly by a base and also by an acid.

• 公益社団法人 日本化学会の論文

著者

• Nonaka Tsutomu

  Department Of Electric Chemistry Tokyo Institute Of Technology

• Fuchigami Toshio

  Department Of Electronic Chemistry Tokyo Institute Of Technology

• Odo Keijiro

  Department of Electrochemistry, Tokyo Institute of Technology

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