923205-89-4Relevant academic research and scientific papers
Ruthenium-Catalyzed Urea Synthesis Using Methanol as the C1 Source
Kim, Seung Hyo,Hong, Soon Hyeok
supporting information, p. 212 - 215 (2016/02/03)
An unprecedented protocol for urea synthesis directly from methanol and amine was accomplished. The reaction is highly atom-economical, producing hydrogen as the sole byproduct. Commercially available ruthenium pincer complexes were used as catalysts. In addition, no additive, such as a base, oxidant, or hydrogen acceptor, was required. Furthermore, unsymmetrical urea derivatives were successfully obtained via a one-pot, two-step reaction.
Parallel synthesis of ureas and carbamates from amines and CO2 under mild conditions
Peterson, Scott L.,Stucka, Sabrina M.,Dinsmore, Christopher J.
supporting information; experimental part, p. 1340 - 1343 (2010/06/15)
"Chemical Equation Presented" A mild and efficient library synthesis technique has been developed for the synthesis of ureas and carbamates from carbamic acids derived from the DBU-catalyzed reaction of amines and gaseous carbon dioxide. Carbamic acids derived from primary amines reacted with Mitsunobu reagents to generate isocyanates in situ which were condensed with primary and secondary amines to afford the desired ureas. Similarly, carbamic acids from secondary amines reacted with alcohols activated with Mitsunobu reagents to form carbamates.
