It has been shown that the reduction of 1,7-diazabicyclo[4,3,0]non-6-ene and of 2,3-dihydroimidazo[1,2-a]-pyridine takes place with the hydrogenolysis of the C=N bond and the formation of 1-(β-aminoethyl)piperidine or its 3,4-dehydro derivative.
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