The efficient synthesis of carbodiimides using a titanium imido complex
摘要:
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
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
I<sub>2</sub>/CHP mediated [1 + 1 + 1 + 1] cyclization of aromatic isocyanides with amines to construct 1,3-diazetidine-2,4-diimine derivatives
作者:Hai-Feng Liu、Tong-Hao Zhu、Pei Xu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c7ob02255g
日期:——
An I2/CHP (cumene hydroperoxide) mediated [1 + 1 + 1 + 1] cyclization of aromatic isocyanides with readily accessible amines via the formation 4 new C–N bonds has been developed to construct unsymmetric 1,3-diazetidine-2,4-diimine derivatives under mild conditions.
AbstractA facile and efficient sonochemical method for the preparation of carbodiimides from their corresponding thioureas or ureas was described. Using Ph3P–I2 combination in the presence of triethylamine, various diaryl, aryl–alkyl, as well as dialkyl substituted substrates could be converted into carbodiimides in good-to-excellent yields within short reaction times under mild conditions with simple
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