Anodic oxidation of the N-cyanomethyl-oxazolidine system: Regioselective chlorination α to the N,O-acetal function
作者:Thierry Martens、Florence Souquet、Jacques royer
DOI:10.1016/0040-4039(94)85030-5
日期:1994.9
The anodicoxidation of the N-cyanomethyl-oxazolidine system in acetonitrile at a platinum electrode, in the presence of a mixture of chloride and bromide ions, regioselectively affords the corresponding monochloro- or dichloro- products α to the N,O-acetal function in goods yields.
Asymmetric synthesis. 26. An expeditious enantioselective synthesis of the defense alkaloids (-)-euphococcinine and (-)-adaline via the CN(R,S) method
作者:Chongwei Yue、Jacques Royer、Henri Philippe Husson
DOI:10.1021/jo00041a028
日期:1992.7
The unnatural enantiomer (-)-euphococcinine (2) and the natural enantiomer of (-)-adaline (3), two homotropane alkaloids, were each prepared in three steps from chiral (-)-2-cyano-6-oxazolopiperidine synthon 8 by the CN(R,S) method. The key steps of these syntheses are the formation of a chiral quaternary center alpha to the piperidine nitrogen with complete stereocontrol and a subsequent intramolecular Mannich reaction. The previously unknown absolute configuration of natural (+)-euphococcinine was deduced from the synthesis of its enantiomer (-)-2.
Martens Thierry, Souquet Florence, Royer Jacques, Tetrahedron Lett, 35 (1994) N 37, S 6879-6882
作者:Martens Thierry, Souquet Florence, Royer Jacques