1-Methyl-4-piperidone is condensed by hydrogen chloride with phenol and 2, 4- dimethylphenol to yield a 4-aryl-tetrahydropyridine (I1 and IV), but with 2, 6-dimethylphenol the diphenol IIIa is formed. Considerable amphoteric polymeric material is formed with the piperidone and phenol; similar polymers are the only reaction products where resorcinol or its monomethyl ether is used instead of phenol. l-Methyl-4-phenyl-4-hydroxypiperidine ...
![4-[4-(4-hydroxy-3,5-dimethylphenyl)-1-methylpiperidin-4-yl]-2,6-dimethylphenol结构式](https://image.chemsrc.com/caspic/128/112896-07-8.png)
