Electrochemical Synthesis of Carbodiimides via Metal/Oxidant-Free Oxidative Cross-Coupling of Amines and Isocyanides
作者:Bhanwar Kumar Malviya、Pradeep K. Jaiswal、Ved Prakash Verma、Satpal Singh Badsara、Siddharth Sharma
DOI:10.1021/acs.orglett.0c00510
日期:2020.3.20
This work discloses an electrochemical oxidative cross-coupling of amines with aryl and aliphatic isocyanides. In an undivided cell, the reaction proceeds without involving any transition-metal catalyst, oxidant, or toxic reagents providing carbodiimides in good yields, thereby circumventing stoichiometric chemical oxidants, with H2 as the only byproduct. Moreover, carbodiimides were in situ converted
Reaction of carbodiimides with α-Br(Cl)-aryl acetic acids produces N,N′-substituted 5-arylhydantoins under very mild conditions and high yields. When the carbodiimides are generated in situ by Staudinger reaction, the process becomes a one-pot, three-component sequential synthesis of libraries of differently substituted 5-arylhydantoins.
Synthesis of Carbodiimides by I<sub>2</sub>/CHP-Mediated Cross-Coupling Reaction of Isocyanides with Amines under Metal-Free Conditions
作者:Tong-Hao Zhu、Shun-Yi Wang、Yang-Qing Tao、Shun-Jun Ji
DOI:10.1021/acs.orglett.5b00722
日期:2015.4.17
An I-2/CHP-mediated cross-coupling reaction of isocyanides with readily accessible amines via CN formation is described for carbodiimide synthesis in moderate to excellent yields. This represents a metal-free strategy for a coupling reaction of isocyanides with amines, and it provides an efficient approach for symmetric and unsymmetric functionalized carbodiimide derivative synthesis under mild conditions
The efficient synthesis of carbodiimides using a titanium imido complex
作者:James C. Anderson、Rafael Bou-Moreno
DOI:10.1016/j.tet.2010.09.073
日期:2010.11
An efficient it synthesis of carbodiimides or ureas from the combination of a titanium imido complex 2 and a range of 12 aryl and aliphatic isocyanates is described Control experiments suggest that carbodimide formation is via heterocumulene metathesis through a transient intermediate eta(2)-ureato-N O metallacycle 8 (C) 2010 Elsevier Ltd All rights reserved