1853-91-4Relevant academic research and scientific papers
Base-mediated synthesis of unsymmetrical 1,3,5-triazin-2-amines via three-component reaction of imidates, guanidines, and amides or aldehydes
Pan, Liyang,Li, Zhenxing,Ding, Tao,Fang, Xiaomin,Zhang, Wenkai,Xu, Hao,Xu, Yuanqing
supporting information, p. 10043 - 10050 (2018/05/31)
A simple and efficient method for the basemediated synthesis of unsymmetrical 1,3,5-triazin-2-amines has been developed. The protocol uses readily available imidates, guanidines, and amides or aldehydes as the starting materials, cesium carbonate as the base, no catalyst or additive is required, and the three-component reaction provides diverse 1,3,5-triazin-2-amines in moderate to good yields with tolerance of wide functional groups.
Process for the preparation of 2-amino-s-triazines
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, (2008/06/13)
The present invention relates to a process for the preparation of 2-amino-s-triazines in three stages. In the first stage nitriles, alcohols and hydrogen chloride are reacted to form the corresponding imido-ester hydrochlorides. In the second stage, the imido-ester hydrochlorides are reacted with cyanamide in the aqueous phase to form the N-cyanimido-esters, which comprises carrying out the first stage in the presence of acetic acid esters and the second stage in an aqueous solution which has been brought to a pH value of 5-8 by addition of bases, and reacting the N-cyanimido-esters with O-alkylisourea, S-alkylisothiourea, guanidine or amidine salts in the presence of a base in the third stage. The 2-amino-s-triazines can be prepared in a high purity and with good yields in this manner.
