53364-99-1Relevant articles and documents
Method for preparing diazacyclooctane intermediate and diazacyclooctane
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Paragraph 0019; 0023-0045, (2020/06/17)
The invention provides a method for preparing a diazacyclooctane intermediate and diazacyclooctane. The preparation method comprises the following steps: synthesizing 1,5-bis(p-toluenesulfonyl)-1,5-diazacyclooctane from 1,3-bis(p-toluenesulfonyl)-1,3-dioxypropane, 1,3-bis(p-toluenesulfonyl)-1,3-propane diamine and sodium methoxide under a temperature condition of 60-100 DEG C; then synthesizing 1,5-diazacyclooctane bromate from 1,5-bis(p-toluenesulfonyl)-1,5-diazacyclooctane, phenol and hydroacetic acid; and finally, synthesizing 1,5-diazacyclooctane from 1,5-diazacyclooctane bromate and sodium methoxide. According to the method, the yield of the 1,5-bis(p-toluenesulfonyl)-1,5-diazacyclooctane can be increased, and the reaction time for synthesizing the 1,5-diazacyclooctane can be shortened.
Gold-Catalyzed Regiodivergent [2 + 2 + 2]-Cycloadditions of Allenes with Triazines
Peng, Shiyong,Cao, Shengyu,Sun, Jiangtao
supporting information, p. 524 - 527 (2017/02/10)
Gold-catalyzed regiodivergent cycloadditions of functionalized allenes with 1,3,5-triazines, providing diverse N-heterocycles in moderate to excellent yields under mild reaction conditions, are reported. Importantly, different types of allenes exhibit distinct selectivity and reactivity for the reactions. Mechanistic investigations reveal that all of the cycloadditions proceed through a stepwise [2 + 2 + 2]-cycloaddition process.
Palladium-Catalyzed Modular Synthesis of Substituted Piperazines and Related Nitrogen Heterocycles
Montgomery, Thomas D.,Rawal, Viresh H.
supporting information, p. 740 - 743 (2016/03/01)
We report here a novel method for the modular synthesis of highly substituted piperazines and related bis-nitrogen heterocycles via a palladium-catalyzed cyclization reaction. The process couples two of the carbons of a propargyl unit with various diamine components to provide nitrogen heterocycles in generally good to excellent yields and high regio- and stereochemical control. (Chemical Equation Presented).