A Cascade Aza-Cope/Aza-Prins Cyclization Leading to Piperidine Derivatives
作者:Jothi L. Nallasivam、Rodney A. Fernandes
DOI:10.1002/ejoc.201403607
日期:2015.3
The cascadeaza-Cope/aza-Prinscyclization of homoallylamines to give substituted piperidines has been explored. The use of glyoxalic acid as the carbonyl component afforded bicyclic structures as a result of the internal carboxylate anion trapping the intermediate cation. The unimolecular bis-, tris-, and tetrakis(homoallylamine)s efficiently delivered the appended bis-, tris- and tetrakis(piperidine-4-ol)s
modern organic synthesis, chemoselectivity is recognized as an important factor in the development of new methodologies. Chemoselective nucleophilic addition to amide carbonyl centers is a challenge because classical methods require harsh reaction conditions to overcome the poor electrophilicity of the amide carbonyl group. We have successfully developed a reductive nucleophilic addition of mild nucleophiles
Mg and Zn mediated allylation of imines with allyl bromide
作者:De-Kun Wang、Li-Xin Dai、Xue-Long Hou、Yi Zhang
DOI:10.1016/0040-4039(96)00791-5
日期:1996.6
Both aldimines and ketimines are allylated under simple Barbier-type conditions using allylbromide and commercial magnesium foil or zinc dust in tetrahydrofuran at room temperature.