The first total synthesis of pandamarine, an alkaloid isolated from Pandanus amaryllifolius is reported. The key step of this extremely short (six steps in total) and protecting group-free synthesis is a highly efficient cascade reaction sequence initiated by the photooxidation of an easily accessible and symmetric difuran precursor.
The first synthesis of racemic pandanusines A and B and pandalizine C, isolated from Pandanus amaryllifolius, is reported. The key synthetic step is an efficient tandem reaction sequence initiated by the photooxidation of an easily prepared furylalkylamine precursor. In this reaction sequence, methyleneblue plays a dual catalytic role of photosensitizer and redox catalyst, first in generating singlet
作者:Kang Yee Seah、Sarah J. Macnaughton、Jonathan W. P. Dallimore、Jeremy Robertson
DOI:10.1021/ol4036424
日期:2014.2.7
The first totalsynthesis of pandamarilactone-1, an alkaloid of Pandanus amaryllifolius, is reported. The nine-step synthesis features furan oxidation with singletoxygen and then spiro-N,O-acetalization and elimination to generate the natural product and further Pandanus alkaloids, pandamarilactonines A–D.