27779-01-7Relevant articles and documents
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Werner
, p. 249 (1892)
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Preparation method of cyano tertiary amine
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Paragraph 0078-0080, (2020/12/09)
The invention relates to the technical field of organic synthesis methods, in particular to a preparation method of N, N-disubstituted cyanamide. According to the invention, secondary amine and 2-bromo-1, 3, 4-thiadiazole, 2, 5-dibromo-1, 3, 4-thiadiazole or 2-bromo-5-methyl-1, 3, 4-thiadiazole are used as raw materials to prepare N, N-disubstituted cyano tertiary amine under the catalysis of a metal salt; the synthetic process is simple, the yield is high, the toxicity of the raw materials is extremely low, the reaction temperature is low, the reaction time is sort, the aftertreatment is simple, and the preparation process is a green preparation process with universality. The method for preparing N, N-disubstituted cyanamide solves the problems of low yield, high toxicity of raw materials, no universality, difficulty in asymmetric disubstituted synthesis and the like in the existing preparation process, and has industrial large-scale application prospects.
Transition-metal free N-arylation of cyanamides by diaryliodonium triflates in aqueous media
Li, Jihui,Zheng, Xinyi,Li, Wei,Zhou, Wei,Zhu, Wen,Zhang, Yucang
supporting information, p. 77 - 80 (2016/01/12)
An operationally simple protocol is established for the synthesis of disubstituted cyanamides through the transition-metal free N-arylation of cyanamides by diaryliodonium triflates in aqueous media. Both alkyl and aryl cyanamides are well compatible with the mild reaction conditions. The one-pot synthesis of ureas is also possible through sequential arylation and hydrolysis of cyanamides, diaryliodonium triflates and H2O with good yields.