3016-39-5Relevant articles and documents
Structural elucidation of dendritic host-guest complexes by X-ray crystallography and molecular dynamics simulations
Chang, Theresa,Pieterse, Koen,Broeren, Maarten A.C.,Kooijman, Huub,Spek, Anthony L.,Hilbers, Peter A.J.,Meijer
, p. 7883 - 7889 (2007)
The multiple monovalent binding of adamantyl-urea poly(propyleneimine) dendrimers with carboxylic acid-urea guests was investigated using molecular dynamics simulations and X-ray crystallography to better understand the structure and behavior of the dynam
Ethyl 2-cyano-2-(4-nitrophenylsulfonyloxyimino)acetate-mediated lossen rearrangement: Single-pot racemization-free synthesis of hydroxamic acids and ureas from carboxylic acids
Thalluri, Kishore,Manne, Srinivasa Rao,Dev, Dharm,Mandal, Bhubaneswar
, p. 3765 - 3775 (2014/05/20)
Ethyl 2-cyano-2-(4-nitrophenylsulfonyloxyimino)acetate (4-NBsOXY) mediated Lossen rearrangement and its application for the synthesis of ureas is demonstrated. Required hydroxamic acids for the Lossen rearrangements were synthesized from carboxylic acids using the same reagent. Finally, reaction of an amine with the produced isocyanate resulted in urea. Good yields without racemization were achieved under milder and simpler reaction conditions. Reactions are compatible with common N-protecting groups, such as Boc, Fmoc, Cbz, and benzyl, as well as various OH protecting groups, such as tBu and Bzl. Conversion from carboxylic acid to urea is achieved in one pot. Most importantly, byproducts Oxyma [ethyl 2-cyano-2-(hydroxyimino)acetate] and 4-nitrobenzenesulfonic acid can be recovered easily and can be recycled to prepare the reagent. Thus, the method is environmentally friendly and cost-effective.
Novel malonamide derivatives as potent κ opioid receptor agonists
Chu, Guo-Hua,Gu, Minghua,Cassel, Joel A.,Belanger, Serge,Graczyk, Thomas M.,DeHaven, Robert N.,Conway-James, Nathalie,Koblish, Michael,Little, Patrick J.,DeHaven-Hudkins, Diane L.,Dolle, Roland E.
, p. 1951 - 1955 (2008/02/02)
A novel series of malonamide derivatives was synthesized. These amides were shown to be potent and selective κ opioid receptor agonists.