Unprecedented dihydrodipyridopyrazines were easily obtained by hetarynic dimerization of 2-alkylamino-3-halogenopyridines in the presence of the complex base NaNH2-tBuONa. Derivatizations of the new heterocycles are described. The anticancer activity of these compounds is also mentioned. (C) 2002 Elsevier Science Ltd. All rights reserved.
Efficient Synthesis of 3-Bromo-2-[(N-substituted)amino]pyridines and their Hetarynic Cyclization
A variety of3-bromo-2-[(N-substituted)amino]pyridines were obtained via two convenient methods and were used in the hetarynic synthesis of the corresponding N-substituted dihydro-dipyridopyrazines.