New synthesis of heterocycles by use of palladium catalyzed cycli zation of α-haloamide with internal double bond
作者:Miwako Mori、Nana Kanda、Izumi Oda、Yoshio Ban
DOI:10.1016/s0040-4020(01)91346-8
日期:1985.1
Synthesis of the alkaloids (−)-heliotridane and (−)-isoretronecanol via π-allyltricarbonyliron lactam complexes.
作者:Julian G. Knight、Steven V. Ley
DOI:10.1016/0040-4039(91)85056-b
日期:1991.11
A novel synthesis of the pyrrolizidine alkaloids (−)-heliotridane (1) and (−)-isoretronecanol (2) is described. The key steps involve the conversion of a proline-derived carbamate (10) into the π-allyltricarbonyliron lactam complex (4) and the exhaustive carbonylation of this to give the pivotal intermediate γ-lactam (3). Lactam (3) has been converted into the title compounds by standard methods.