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
Synthesis of ureas from titanium imido complexes using CO<sub>2</sub>as a C-1 reagent at ambient temperature and pressure
作者:James C. Anderson、Rafael Bou Moreno
DOI:10.1039/c1ob06576a
日期:——
unsaturated 12-electron complex dichloro t-butylimido bispyridine titanium(IV) (2a) has been shown to react with CO2 to give N,N-bis-t-butyl urea. Two analogous sterically hindered coordinatively saturated 14-electron complexes dichloro t-butylimido trispyridine titanium(IV) (10a) and dichloro 2,6-(i-Pr)2phenylimido trispyridine titanium(IV) (10b) also gave their corresponding symmetricalureas upon treatment