The Andrea von Braun Foundation

Von Braun (BrCN) Reaction on Solasodine

von Braun Cyanogen Bromide Reaction, Solasodine, 13C NMR Solasodine on reaction with BrCN yielded two isomeric cyanamides in a ratio of 3:1, which have been characterised as C-22 configurational isomers, N-cyanosolasodine (22 R, 25 R) I IA and N-cyanosolasodine (22 S, 25 Rj II B on the basis of HI and *3C NMR studies. The same reaction with piperidine, yielded its cyanamide, the 13C NMR of whic...

The Alexander von Humboldt-Foundation

The Alexander von Humboldt Foundation promotes academic cooperation between excellent scientists and scholars from abroad and from Germany. To this end, it grants more than 700 research fellowships and research awards annually. These allow scientists and scholars from all over the world to come to Germany to work on a research project they have chosen themselves together with a host and collabo...

Some Extensions of von Braun (BrCN) Reaction on Organic Bases

von Braun Cyanogen Bromide Reaction Some extensions of von Braun cyanogen bromide reaction have been undertaken on conessine, isoconessine and two simpler bases, dimethyl a-naphthyl amine and diethyl amine. The monocyanamides of conessine and isoconessine yielded acid amides, aminoderivatives (diamines) and guanido derivatives on careful hydrolysis, reduction and treatment with ammonia, respect...

Andrea Musacchio

refinements of this equipment. There was a direct analogy with the voltage clamp approach in nerve, but now length or force became the controlled parameter in place of voltage. This approach was applied in a quantitative study of the relation between the steady force produced by an active muscle fiber and its length: Huxley showed that force is proportional to overlap between the thick and thin...

Does Decentralization Serve the Poor? by Joachim von Braun and Ulrike Grote, November 2000