A simple and efficient synthesis of polysubstituted 4-piperidones was achieved from the double Mannich reaction of β-keto esters and bisaminol ethers. The reaction is highly diastereoselective, as is the subsequent hydride reduction, to give polysubstituted 4-piperidols.
通过β-
酮酯和双胺醇醚的双曼尼希反应实现了多取代
4-哌啶酮的简单有效合成。该反应是高度非对映选择性的,随后的
氢化物还原也是如此,以得到多取代的 4-
哌啶醇。