115407-74-4Relevant articles and documents
Incorporation and Deoxygenation of Carbon Dioxide: A Metal-Assisted Facile Conversion of Carbon Dioxide and Primary Amines to Isocyanates
Belforte, Antonio,Dell'Amico, Daniela Belli,Calderazzo, Fausto
, p. 1891 - 1898 (2007/10/02)
Metal N-alkylcarbamato complexes (M = Na, n = 1; M = Mn, Co, n =2) were prepared by treating CO2 with a primary amine RNH2 (R = Ph, Cy, Pr) and various complex precursors.For M = Mn or Co and R = Cy, MCl2 can be used as starting material.These complexes were readily decomposed by acyl halides R'COCl (R' = Ph, Me), and two reaction pathways were observed.One led to decarboxylation and formation of amides RNHC(O)R', while the other afforded isocyanate RNCO and carboxylic acid (M = Na) or carboxylic anhydride (M = Mn, Co).Analysis of the reaction products showed that the metal plays a major role in the formation of the isocyanate, intercepting one of the reaction products.A mechanistic rationalization is proposed.