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Under the relatively mild conditions of a threefold Mannich reaction, starting from the 1,3-cyclohexanedione derivatives 2, the formation of three neighboring quarternary sp 3 -carbon centers succeeds in a single reaction step.

zeitschrift für naturforschung b

Dreifache Mannich-Cyclisierung Aufbau von drei benachbarten quartären sp 3 -Kohlenstoffzentren in einem Reaktionsschritt / Threefold Mannich Reaction Formation of Three Neighboring Quarternary sp 3 -Carbon Centers in a Single Reaction Step