Cobalt(II)-Catalyzed Isocyanide Insertion Reaction with Sulfonyl Azides in Alcohols: Synthesis of Sulfonyl Isoureas
作者:Tian Jiang、Zheng-Yang Gu、Ling Yin、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.7b01127
日期:2017.8.4
A Co(II)-catalyzed isocyanide insertion reaction with sulfonyl azides in alcohols to form sulfonyl isoureas via nitrene intermediate has been developed. This protocol provides a new, environmentally friendly, and simple strategy for the synthesis of sulfonyl isoureaderivatives by employing a range of substrates under mild conditions.
Selective Oxidative Coupling Reaction of Isocyanides Using Peroxide as Switchable Alkylating and Alkoxylating Reagent
作者:Xinglu Zhang、Zhiqiang Liu、Yu Gao、Feng Li、Yaming Tian、Chunju Li、Xueshun Jia、Jian Li
DOI:10.1002/adsc.201700953
日期:2018.1.17
A switchable oxidativecoupling reaction of isocyanide and peroxide has been disclosed. In the presence of iron catalyst, the coupling reaction affords N‐arylacetamides in good yields. By simply replacing the iron with copper catalyst, another different coupling reaction takes place in which peroxide can serve as alkoxylating source. This protocol represents a new fundamental coupling of two basic
Electrochemical generation of alkyl and aryl isocyanides
作者:Antoio Guirado、Andrés Zapata、Jesús L. Gómez、Luis Trabalón、Jesús Gálvez
DOI:10.1016/s0040-4020(99)00509-8
日期:1999.7
An efficient and widely applicable reagent-free method for the synthesis of alkyl and arylisocyanides has been established. The electrochemical reduction of alkyl and aryl carbonimidoyl dichlorides under constant cathode potential leads to the corresponding isocyanides in almost quantitative yields. The availability of the starting materials, the mildness of the reaction conditions as well as the
Copper-Catalyzed<i>N</i>-Aryl-β-enaminonitrile Synthesis Utilizing Isocyanides as the Nitrogen Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201400973
日期:2015.3.23
A novel synthetic protocol for N‐aryl‐β‐enaminonitriles, which are useful building blocks for heterocycle synthesis, was developed using isocyanides as the nitrogen source. Using copper‐catalyzed one‐step reactions between isocyanides and benzyl cyanides under mild conditions, diverse N‐aryl‐β‐enaminonitriles could be synthesized in excellent yields and with high atom‐efficiency. N‐Alkyl‐β‐enaminonitriles
cascade reaction of azides with isonitrile and amines is presented; it offers an alternative facile approach toward N-sulfonyl-, N-phosphoryl-, and N-acyl-functionalized guanidines in excellent yield. These series of substituted guanidines exhibit potential biological and pharmacological activities. In addition, the less reactive intermediate benzoyl carbodiimide could be isolated by silica gel column flash