作者:John K Gallos、Katerina C Damianou、Constantinos C Dellios
DOI:10.1016/s0040-4039(01)01099-1
日期:2001.8
A new total synthesis of enantiomerically pure pentenomycin has been achieved by the intramolecular nitrone cycloaddition of the proper γ-unsaturated aldehyde, easily accessible from l-arabinose, followed by reductive NO bond cleavage and further oxidative deamination of the resulting aminocyclopentitol.
Traceless solid-phase synthesis of hydroxylated cyclopentenones
作者:Christos I. Stathakis、John K. Gallos
DOI:10.1016/j.tetlet.2008.09.080
日期:2008.11
Intramolecular nitrone-alkene cycloadditions on solid phase can be performed using polymer-bound hydroxylamine. Condensation of this reagent with sugar derived 4-pentenals followed by N-O cleavage, quaternization of the amine thus produced, and finally oxidative elimination of the amino group detaches the chiral hydroxylated cyclopentenones from the polymer. The natural antibiotic pentenomycin I was prepared in this way. (C) 2008 Elsevier Ltd. All rights reserved.