35305-46-5Relevant articles and documents
Synthesis method of substituted urea compound
-
Paragraph 0034-0039; 0078-0083, (2021/03/31)
The invention discloses a synthesis method of a substituted urea compound, which comprises the following steps: stirring aldehyde, N-aryl urea, trichlorosilane and Lewis base in an organic solvent ata temperature range of -20 DEG C to room temperature for
An easy access to unsymmetrical ureas: A photocatalytic approach to the Lossen rearrangement
Yadav, Arvind K.,Srivastava, Vishnu P.,Yadav, Lal Dhar S.
, p. 24498 - 24503 (2014/07/07)
An efficient and operationally simple method for the synthesis of unsymmetrical ureas from various hydroxamic acids and amines has been developed. Plausibly, the protocol involves visible-light-initiated in situ formation of Vilsmeier-Haack reagent and COBr2 with CBr4 and a catalytic amount of DMF in the presence of Ru(bpy)3Cl2 as a photocatalyst to bring about the Lossen rearrangement at room temperature. the Partner Organisations 2014.
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.
