Synthesis of Fused Tricyclic Amines from Enolizable Acyclic Aldehydes by Cyclization then Dipolar Cycloaddition Cascade: Synthesis of Myrioxazine A
作者:Adam J. M. Burrell、Iain Coldham、Niall Oram
DOI:10.1021/ol9001653
日期:2009.4.2
A tandem one-pot reaction involving a condensation, then cyclization (N-alkylation), followed by an azomethine ylide or nitrone dipolar cycloaddition allows a synthesis of tricyclic amines from acyclic enolizable aldehydes. The reaction was unsuccessful using amino acids or esters but was successful with (tributylstannyl)methylamine or hydroxylamine. One of the products was converted in two steps to
Asymmetric synthesis of myrioxazines A and B, novel alkaloids of Myrioneuron nutans
作者:Van Cuong Pham、Akino Jossang、Angèle Chiaroni、Thierry Sévenet、Bernard Bodo
DOI:10.1016/s0040-4039(02)01771-9
日期:2002.10
Two new epimeric tricyclic alkaloids, myrioxazines A and B were isolated from the leaves of Myrioneuron nutans and their structures elucidated by spectral analysis (mass spectrometry and 2D NMR). Absolute configurations were determined by total asymmetric synthesis.