2,6-Disubstituted and 2,2,6-Trisubstituted Piperidines from Serine: Asymmetric Synthesis and Further Elaboration
作者:Hukum P. Acharya、Derrick L. J. Clive
DOI:10.1021/jo101010c
日期:2010.8.6
4-Hydroxy-3,4-dihydro-2H-pyridine-1-carboxylic acid benzyl esters, which are readily prepared from serine and terminal acetylenes, undergo Claisen rearrangement to piperidine derivatives when heated with butyl vinyl ether in the presence of Hg(OAc)2 and Et3N. This route to optically pure piperidines having substituents α to nitrogen is general, and the rearrangement products are versatile intermediates for making
由丝氨酸和末端乙炔容易制得的4-羟基-3,4-二氢-2 H-吡啶-1-羧酸苄基酯在存在汞的情况下与丁基乙烯基醚一起加热时,会发生克莱森重排成哌啶衍生物。 OAC)2和Et 3 N.这条路线具有取代基α为氮旋光纯的哌啶是通用的,并且重排产物是多用途的中间体用于制备宽范围的含取代的哌啶亚基胺。