26416-38-6Relevant articles and documents
Preparation of Carbodiimides with One-Handed Axial Chirality
Taniguchi, Tohru,Suzuki, Takahiro,Satoh, Haruka,Shichibu, Yukatsu,Konishi, Katsuaki,Monde, Kenji
supporting information, p. 15577 - 15581 (2018/11/23)
The axial chirality of carbodiimide was proposed in 1932, but the synthesis of carbodiimide with one-handed axial chirality has not been achieved because of the low barrier of racemization. This work presents a strategy to use a conformationally restrained cyclic structure for creating carbodiimides whose biases of the axial chirality (labeled as SNCN/RNCN) are higher than 100:1, as determined by vibrational circular dichroism spectroscopy and density functional theory calculations.
A One-Pot Synthesis of Symmetrical and Unsymmetrical Dipeptide Ureas
Fayad, Antoine Abou,Pubill-Ulldemolins, Cristina,Sharma, Sunil V.,Day, David,Goss, Rebecca J. M.
, p. 5603 - 5609 (2015/09/01)
We describe a flexible and high yielding synthesis of 1,3-disubstituted ureas that allows for the construction of both symmetrical and unsymmetrical dipeptide ureas, including easy access to 13C-labelled ureas, from amino acids and carbon dioxide at atmospheric pressure. We describe a flexible and high yielding synthesis of 1,3-disubstituted ureas, that allows for the construction of both symmetrical and unsymmetrical dipeptide ureas, including easy access to 13C labelled ureas, from amino acids and carbon dioxide at atmospheric pressure.
Semicarbazones from N-hydroxyureas and amines: A novel entry in the reactivity of the acyl nitroso group
Paz, Jairo,Perez-Balado, Carlos,Iglesias, Beatriz,Munoz, Luis
supporting information; experimental part, p. 1800 - 1803 (2011/06/10)
The condensation of carbamoyl nitroso compounds, obtained by oxidation of N-hydroxyureas, with amines unexpectedly afforded semicarbazones (aka carbamoyl hydrazones). Although the substitution of the nitrosyl moiety might compete to afford the correspondi