15936-45-5Relevant articles and documents
-
Plieninger,H.,Herzog,H.
, p. 807 - 824 (1967)
-
Amination of Carbenium Ions Generated by Directed Protonolysis of Cyclopropane
Skvorcova, Marija,Lukasevics, Lukass T.,Jirgensons, Aigars
, p. 3780 - 3792 (2019/03/29)
Directed intramolecular protonolyis of the cyclopropane C-C bond is demonstrated as a strategy to generate carbenium ions. This intermediate can be subjected to amination with nitriles under Ritter reaction conditions. Directing groups such as carbamate, carboxamide, urea, ester, and ketone were found to be efficient for regioselective anti-Markovnikov cleavage of cyclopropane. Depending on the directing group, the amination provided orthogonally protected 1,4-diamine, ?-amino carboxylic, and ?-amino ketone derivatives.
Poly-β-peptides from functionalized β-lactam monomers and antibacterial compositions containing same
-
Page/Page column 18, (2015/09/23)
Disclosed is a method of making β-polypeptides. The method includes polymerizing β-lactam-containing monomers in the presence of a base initiator and a co-initiator which is not a metal-containing molecule to yield the product β-polypeptides. Specifically disclosed are methods wherein the base initiator is potassium t-butoxide, lithium bis(trimethylsilyl)amide (LiN(TMS)2), potassium bis(trimethyl-silyl)amide, and sodium ethoxide, and the reaction is carried out in a solvent such as chloroform, dichloromethane, dimethylsulfoxide, or tetrahydrofuran.