1. V. I. Gunar, L. F. Ovechkina and S. I. Zavyalov, Izv. Akad. Nauk SSSR, Otd. Khim. Nauk., 110 (1963);
2. Chem. Abstr., 59, 7385b (1963).
3. A. A. Semenov, I. V. Terenteva, Khim. Geterosikl Soedin., 235 (1965).
4. Carbon—Carbon Alkylations of Enamines with Mannich Bases