The total synthesis of a potent immunosuppressant (-)-FR901483 is accomplished. The skeleton itself is constructed by the Ugi 4CC reaction, subsequent intramolecular Dieckmann condensation, and a diastereoselective intramolecular aldol reaction. However, the remarkable feature is the stereoselective incorporation of the p-methoxybenzyl and methylamino groups within the tricyclic core skeleton.
The total synthesis of a potent immunosuppressant (-)-FR901483 is accomplished. The skeleton itself is constructed by the Ugi 4CC reaction, subsequent intramolecular Dieckmann condensation, and a diastereoselective intramolecular aldol reaction. However, the remarkable feature is the stereoselective incorporation of the p-methoxybenzyl and methylamino groups within the tricyclic core skeleton.
Synthesis of the optically active key intermediate of FR901483
作者:Shigeru Ieda、Toshiyuki Kan、Tohru Fukuyama
DOI:10.1016/j.tetlet.2010.05.089
日期:2010.8
Efficient synthesis of the tricyclic key intermediate 2 for (−)-FR901483 1 was accomplished. The precursor of the intramolecular aldol reaction 4b is constructed by the Ugi 4CC reaction and subsequent intramolecular Dieckmann condensation. This approach allows a fully stereocontrolled total synthesis of (−)-FR901483, which would provide various derivatives.
Asymmetric Synthesis of Unsaturated Monocyclic and Bicyclic Nitrogen Heterocycles
作者:Hiroshi Nomura、Christopher J. Richards
DOI:10.1021/ol900880w
日期:2009.7.2
Hydrolysis of scalemic trichloroacetamides Cl3CCONHCH(R)CHCH2 and allylation, or acylation with but-3-enoic acid, followed by ring-closing metathesis resulted in the formation of unsaturated pyrrolidine and piperidine building blocks. These were employed in the synthesis of (S)-coniine (R = Pr) and a formal synthesis of (+)-anisomycin (R = p-MeOC5H4). Extension of this methodology with R = CH2CHCH2 employing two ring-closing metatheses resulted in the synthesis of unsaturated quinolizidinone and indolizidinone frameworks.
The total synthesis of a potent immunosuppressant (-)-FR901483 is accomplished. The skeleton itself is constructed by the Ugi 4CC reaction, subsequent intramolecular Dieckmann condensation, and a diastereoselective intramolecular aldol reaction. However, the remarkable feature is the stereoselective incorporation of the p-methoxybenzyl and methylamino groups within the tricyclic core skeleton.