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Multi-membered N-heterocycles R 0690Use of the tert-Amino Effect in the Synthesis of Spirocyclic Fused α-Carbolines. -The cyclization of the intermediates (V) gives rise to novel spirocyclic fused α-carbolines (VI). Low yields of the products are caused by resinification of the reaction mixture. -(VLASKINA, N. M.; SUZDALEV*, K. F.; BABAKOVA, M. N.; MEZHERITSKII, V. V.; KARTSEV, V. G.; Russ. Chem. Bull. 55 (2006) 2, 384-386; Inst. Phys. Org. Chem., Rostov State Univ., Rostov-on-Don 344090, Russia; Eng.) -R. Staver 48-174