中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-(2-哌啶-1-基苯基)乙酮 | 1-[2'-(piperidin-1''-yl)phenyl]ethan-1-one | 39911-06-3 | C13H17NO | 203.284 |
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.
The 2-(1-piperidinyl)-acetophenones 11, 16-19 showed a similar behavior with mercury(II)-EDTA but gave rise to a product pattern. The trans-benzoquinolizidones 12, 20, 23, 26, 29 resulted from the cyclic iminium compounds reacting with the acetyl group as nucleophile. By another oxidation these species were partially transformed to the quinolinones 13, 21, 24, 27, 30. An intermediate electrophilic neighboring of the carbonyl group with the cyclic hemiaminals led finally to the lactams 14, 22, 25, 28, 31. Mechanisms for the reactions are proposed