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Dehydrogenation of 2-(1-piperidinyl)-benzaldehydes 1-3 using mercury(II)-EDTA gen erated the lactams 4-6, indicating a reversible reaction of a carbinolamine intermediate with the formyl group. The yields and oxidation rates decreased by 4-substitution in the piperidine moiety.

zeitschrift für naturforschung b

Reaktionsbeteiligung elektrophiler Funktionen bei der Dehydrierung 4-substituierter Piperidine / Participation of Electrophilic Groups with the Dehydrogenation of 4-Substituted Piperidines