摘要:
2,2,6,6-tetramethyl-4-oxopiperidine is prepared from acetone and ammonia in the presence of catalytic amounts of active halogen compounds selected from sulfonylhalides, sulfurylhalides, N-haloamides, N-haloimides, β-haloesters, α-haloketones, α-halohydroxy compounds, and β-halonitriles.